What is the quietest 300 blackout suppressor

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What is the quietest 300 blackout suppressor. The quietest tire brands on the market come from Goodyear and Michelin, according to Tire Rack. Specific passenger car tire models are the Goodyear Assurance ComforTred, Michelin D...

Aug 8, 2020 · The Best 300BLK Suppressors Available Criteria: For me, picking a 300BLK suppressor primarily focuses on noise reduction. Sure, many Blackout shooters will use supersonic loads for hunting and defensive situations. But for the most part, everyone wants solid subsonic performance. Obviously there are other important criteria for 300 Blackout ...

As technology continues to advance, so does the need for reliable power sources. Inverters have become an essential component in many households, providing a backup power supply du...Best User-Serviceable .30 Cal Suppressor: BANISH .30 .17 to .300 Wbv: 11.2-14.3 ounces depending on model and configuration: 7-9" depending on model and configuration: 34 dB: $999: Best .30 Cal Suppressor for Your Money: Coastal Guns 30 Cal LRT: 7.62: 28 ounces: 8.25” 30 dB: $550: Best .308 Suppressor : SilencerCo Omega 300: 5.56-.300 ...The subsonic 300 Blackout loads are often compared to 45 ACP, 10 mm or 9mm subsonic rounds. This showcases the dual purpose of the round. The advantage of 300 Blackout is if the shooter wants an AR-pattern rifle or pistol that is easily suppressed, they can use a common magazine and typically only need to swap an upper receiver.Oct 25, 2023 · Lower-pressure, slower-moving cartridges like .22lr or subsonic 300BLK will be quieter than fast-moving high-pressure rounds like .300 WinMag or 5.56. There are a …With a suppressor, a bolt action .300 Blackout can be relatively quiet, making it suitable for hunting without scaring off game due to noise. 7. Is there a specific type of suppressor that works best with a .300 Blackout? A suppressor specifically designed for .300 Blackout rifles will work best, as it is optimized for the caliber. 8.The Obsidian45 mount is machined from 17-4 Stainless Steel barstock. We strategically place the engraving on the thickest cross section of the 17-4 Stainless Steel Mount for fast and easy replacement should the suppressor become damaged beyond repair. It also serves to make the Obsidian45 infinitely upgradeable in the future.

Oct 25, 2023 · Lower-pressure, slower-moving cartridges like .22lr or subsonic 300BLK will be quieter than fast-moving high-pressure rounds like .300 WinMag or 5.56. There are a …When it comes to ensuring uninterrupted power supply during blackouts or emergencies, whole house generators are a popular choice. These powerful machines can provide electricity t...In an otherwise quiet outdoor setting, the sound of a gunshot is unnatural and can put the game in the area on high alert. ... Here’s a rundown of five of the most popular calibers for suppressed hunting..300 AAC Blackout. The .300 AAC Blackout, or .300 Blackout or .300BLK, is an absolute dream when paired with a suppressor. The …The Obsidian45 is the quietest 45 suppressor on the market and is rated for practically all center-fire pistol calibers, along with common lever action calibers. Our ADAPT™ Module gives you 2 lengths in one suppressor, for ultimate …The SilencerCo Omega 300 suppressor stands as a versatile giant, seamlessly accommodating a diverse array of calibers from 5.7x28mm to .300 Winchester Magnum. Its adaptability is like a master key for firearms, offering unparalleled flexibility without the constraints of barrel length requirements. This suppressor is set to revolutionize your ...225. 210. Nov 1, 2022. #5. Just my experience, 22lr with a SiCo sparrow with CCI standard velocity in a single shot rifle will be a little bit quieter than 300 blk with a sig 762TIQd (one of the quietest 300 blackout cans) in a single shot 300 blk but not by much. It has more to do with compression vs sound.The general advice if you want to cover 90% of your use cases with suppressors, is to plan for three. A .22 user serviceable, a .30 rifle, and a .45 pistol can. That'll take care of everything but big bore rifle and shotguns. If this is going to be your one and only can, you could do what I did and go with a SiCo Hybrid.

Are you intending on getting a new deck installed? If so, you are likely going to be interested in a detailed comparison of composite decking vs wood deck. Expert Advice On Improvi...Nov 4, 2021 · DDM4ISR Specs & Features. With that bit of cartridge context out of the way, let’s jump into the Daniel Defense DDM4ISR. The DDM4ISR features a 9-inch cold hammer-forged barrel with an integrated suppressor that brings the overall barrel length to 16-inches. The gun comes with a suppressor basically built-in.Jan 26, 2024 · Dead Air Armament Sandman-S. One of the shortest 300 Blackout suppressors available is the Dead Air Armament Sandman-S Suppressor. Additionally, it makes very few performance concessions in exchange for a smaller form factor. This suppressor is short and light, measuring just 6.8 inches in length and 18.5 ounces in weight.14 Feb 2020 ... Comments41 ; Everything You're NOT Supposed to Know About Suppressors. T.REX ARMS · 3.6M views ; The Quietest Rifle Only Costs $350. Backfire · 3....Our next model is perhaps the most recommended mid-range 300 blackout suppressor available on the market, so you cannot go wrong with the AAC 762-SDN-6. This versatile design will work impressively well with any 300 AAC blackout round, but it also has been specifically designed to process 7.62x51mm (.308Win) ammunition.

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What is the quietest silencer for your suppressed firearm? The quietest suppressor for your use case is listed on this page with detailed links to the Silencer Sound Standard test …The Omega 300 is the most-sold suppressor, ever. The Omega 300 is a multi-caliber suppressor, rated from .223 REM/5.56 NATO to .300 WM. This suppressor is warrantied for short barrels down to 7” .300 BLK, 10” 5.56 NATO, 16”, 7.62 NATO, and 20” barrels for magnum calibers. It ships with a 5/8×24 Bravo Direct Thread Mount, Bravo Basic ...If you’re in need of a reliable power source while on the go, a 600w power inverter can be an excellent investment. Whether you’re camping, traveling in an RV, or simply need backu...The .300 AAC Blackout (designated as the 300 BLK by the SAAMI and 300 AAC Blackout by the C.I.P.), also known as 7.62×35mm, is an intermediate cartridge developed in the United States by Advanced Armament Corporation (AAC) for use in the M4 carbine.The cartridge yields increased performance in shorter barrels and effective subsonic …LG brand refrigerators are known for being the quietest. The LG compressor has a cooling cycle that has particularly low sound levels. LG refrigerators are also Energy Star Certifi...The SilencerCo Omega 36M is a great suppressor, especially if you really want one that is multi-caliber, capable, and modular. It’s convenient to change the suppressor’s length as desired, and it’s fantastic that it can be used on a wide variety of guns. As much as we’d like to have a suppressor for every gun we own, it tends to be ...

Then you add the SOCOM 300 SPS and make sure everything stays tight. The muzzle device won’t be timed right, but that doesn’t matter once the suppressor is attached. Keep the Warcomp and the inside of the suppressor clean and it works great. If you are going to dump mags - permanently attach you muzzle attachment.Suppressor #3: SilencerCo Omega 300. SilencerCo’s Omega 300 is the lightest, shortest, quietest, full-auto-rated, titanium silencer in its category. If you like to have choices and options, it even comes complete with direct thread and fast-attach mounts, as well as a removable Anchor Brake to reduce recoil, which can be replaced with a flat ...A 300 Blackout integral rifle silencer system as it should be made: Light, Fast, Accurate and above all: Quiet. The original Liberty Suppressors Leonidas Ti was built from the need for a 300 Blk suppressor built specifically to maximize the performance of this cartridge for absolute suppression. Now, the Leonidas Gen 2 builds on that legacy.or $249.75 with an eZ-Pay Plan. The most versatile suppressor in the Banish line, the Banish 30 works with all of your rifle calibers from .17 to .30 caliber magnums. Modular Suppressor ( 7″ or 9″) Below hearing safe. Multi-Caliber .17 …The Ghost 45 is a modular centerfire multi-caliber pistol/subgun suppressor that is rated all the way up to 300 blackout sub-sonic. It’s full-auto rated for when things get exciting and features a unique patent pending modular design. Break it down to the short configuration and you have the smallest and quietest .45 can in its class.The CGS Hyperion FS is literally the quietest .30 caliber silencer on the market, and the Hyperion K without a doubt outperforms for its size. Overall * * * * 1/2. If you’re seeking the best sound suppression available, the Hyperion is a five-star silencer without a doubt, whatsoever. Nothing beats it and it likely isn’t even particularly ...As technology continues to advance, so does the need for reliable power sources. Inverters have become an essential component in many households, providing a backup power supply du...Best QD 7.62 Suppressor – Dead Air Sandman-S. Because it is a common tactical and military cartridge, we expect most 7.62 shooters to have some sort of semi-auto rifle, sometimes with an NFA-regulated short barrel. With that in mind, we looked for a suppressor designed for those kinds of gun owners. The Dead Air Sandman-S is so wildly popular ...We’ll talk more about how the 5.56 and 300 Blackout stack up against one another in a moment. Summary: The 300 AAC Blackout is cartridge designed to work in AR-15s and other rifles with shorter-than-average barrels. It fires a .30-caliber, 110 to 220-grain bullet and reliably works with and without a suppressor.The rifles this one or two Cans would be going on are the following : 1. .308 LWRC REPR w/ 16 inch barrel and a piston POF .308 w/ 16 inch barrel. 2. 300 Blackout PWS piston AR. 3. 300 Black Out bolt action pistol by Gear Head Works w/ arm brace & 9 inch barrel.Aug 8, 2020 · Rating: 17HMR through .300 RUM/.300 WIN MAG; Full Auto Rated; 300 Blackout: 8″ minimum barrel length; MSRP: $650; Manufacturer’s site: YHM – https://yhm.net/yhm-resonator-r2.html; …

The GMT-300BLK is a compact (6.7” long) and lightweight (14 ounces) suppressor that is optimized for use with both super- and subsonic ammunition in short-barreled rifles. This direct-thread silencer is as versatile as it is convenient. Being a user-serviceable unit, the GMT-300BLK is easy to disassemble for cleaning and general maintenance.

The SilencerCo Omega 36M is a great suppressor, especially if you really want one that is multi-caliber, capable, and modular. It’s convenient to change the suppressor’s length as desired, and it’s fantastic that it can be used on a wide variety of guns. As much as we’d like to have a suppressor for every gun we own, it tends to be ...ll cover my custom 300 blackout build, shooting it suppressed using the surefire SOCOM 300sps and subsonic ammunition. This is by far the quietest AR I own a...Dead Air Armament Sandman-S. One of the shortest 300 Blackout suppressors available is the Dead Air Armament Sandman-S Suppressor. Additionally, it makes very few performance concessions in exchange for a smaller form factor. This suppressor is short and light, measuring just 6.8 inches in length and 18.5 ounces in …The Obsidian45 is the quietest 45 suppressor on the market and is rated for practically all center-fire pistol calibers, along with common lever action calibers. Our ADAPT™ Module gives you 2 lengths in one suppressor, for ultimate …A 300 Blackout integral rifle silencer system as it should be made: Light, Fast, ... Leonidas Ti, the 8″ monocore module gives superb supression and rigidity, which helps to ensure that you are both quiet and baffle strike free. Reduced Length. With an 8.3″ barrel, an 8.2″ monocore baffle module, and a 5.5″ reflex chamber (back over the ...This premium .30 caliber silencer is extremely lightweight and short, while still boasting impressive sound suppression. It’s the optimal choice for suppressed hunting, long-range precision shooting or days at the range. The Scythe-Ti is a .30 caliber suppressor, handling calibers ranging from .223 REM/5.56 NATO all the way up to .300 RUM.Jun 27, 2019 · One popular choice is using a .30 caliber silencer to shoot rounds such as .308/7.62 NATO, and 300 AAC BLK, but also using it to shoot smaller .223 and 5.56 NATO rounds. Even though a .30 Cal silencer will suppress a gun shot from a smaller caliber, the sound isn’t as suppressed as it would if the shooter were using a model made exclusively ...Suppressed subsonic .300 Blackout is definitely one of the cooler combos to shoot. The ballistics and bullet drop are laughable outside of living room distances. A 220-grain bullet leaving a 9-inch barrel at 1,000 fps through a suppressor creates almost zero noise, but with a 100-yard zero drops 29 inches across the ensuing 100 yards, it runs ...

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What I found was that it was no more quiet than the Omega 300. I believe that Blackout subs are "fully suppressed" in Omega-sized suppressors. In my findings, the Omega 300 is the gold standard for a Blackout suppressor. It's quiet, isn't heavier than it needs to be, takes Dead Air Keymo, and is backed by SiCo customer service.8.6 Blackout Subsonic Ammo . The 8.6 Blackout fires a 250- to 300-grain, .338 caliber bullet at subsonic velocities and is effective on nearly any animal in North America, including deer, hogs, elk, bear, and moose. The 8.6BLK is optimized for silencers, keeping it nice and quiet with minimal recoil for its size and effectiveness. 375 Raptor ...The Omega 300 is the most-sold suppressor, ever. The Omega 300 is a multi-caliber suppressor, rated from .223 REM/5.56 NATO to .300 WM. This suppressor is warrantied for short barrels down to 7” .300 BLK, 10” 5.56 NATO, 16”, 7.62 NATO, and 20” barrels for magnum calibers. It ships with a 5/8×24 Bravo Direct Thread Mount, Bravo Basic ...The Custom .300 Blackout is available in both rifle and braced pistol configurations. They come with free-floated M-LOK rails, a 3.5-pound flat-face trigger, Magpul furniture, and a set of MBUS sights to top it off. What you end up getting is a well-made, practical rifle that's just waiting for a suppressor.Jan 26, 2024 · This .30 cal suppressor is fully welded, full auto rated, and compatible with numerous Charlie accessories. It weighs between 9.8 ounces and 12.5 ounces depending on configuration. In its shorter length it’s 4.9-inches long and in its longest length it’s 6.85 inches in length.The Omega is designed for ammo ranging from the small 5.7 mm to the potent .300 Win. Mag. The suppressor has an overall length of 7.09 inches, a diameter of 1.56 inches, and a weight of only 14 ...25 Jul 2022 ... 300 AAC Blackout Suppressed. hickok45•3M views · 12 ... The Quietest Rifle Only Costs $350. Backfire ... 5.56 Suppressor Comparison. Joe Lynch•152K ...A 300 Blackout integral rifle silencer system as it should be made: Light, Fast, Accurate and above all: Quiet. The original Liberty Suppressors Leonidas Ti was built from the need for a 300 Blk suppressor built specifically to maximize the performance of this cartridge for absolute suppression. Now, the Leonidas Gen 2 builds on that legacy.24 Apr 2019 ... In this video, I shoot a .300 Blackout with a Silencer to compare subsonic ammo and supersonic ammo. If you would like to help support the ...There are a number of different hunting cartridges out there, but one that’s proven is from Barnes. Barnes is a premium ammo, and it comes at a premium price, but the payoff is ethical hunting, and that makes it worth the extra cents. 4. Federal Premium Power-Shok .300 AAC Blackout 150 grain. Runner up for Hunting. ….

Nov 4, 2021 · What do you get when you pair an integrally suppressed rifle with the .300 Blackout cartridge? The Daniel Defense DDM4ISR, of course. Though this premium rifle from Daniel Defense steps it up with that .300 …The .300 BLK has easily been the most successful new caliber in the last 20 years. Besides the easy conversion between 5.56 and .300 BLK, the .300 BLK does a lot the 5.56 can’t. First off, it’s a very versatile load with projectiles weights ranging from 110 grains to 220 grains. (L to R) 5.56 NATO, .300 BLK, .30 Carbine.The Alaskan360™ is the most adaptable, lightweight, multicaliber suppressor able to handle hard days on the range, back country adventures and anything in between. Moreover, the Alaskan360™ provides outstanding flexibility as its rated for pistols and subguns up to 9mm and rifles up to .338 Lapua. This is the first suppressor to use the ...Read our latest news and guides on how to earn and maximize Southwest Rapid Rewards miles to travel for free. At a glance Southwest Rapid Rewards points are easy to earn and redeem...9 Mar 2023 ... This gun is bussin ong. Hands down one of the most reliable .300 blackout carbines I've owned to date. What makes this gun so unique is the ...gunmade ... Loading...9 Mar 2023 ... This gun is bussin ong. Hands down one of the most reliable .300 blackout carbines I've owned to date. What makes this gun so unique is the ...300 BLACKOUT; 6mm ARC . 5.56 NATO / .223 Remington. ... It was purpose-built for suppressors; subsonic 300BLK paired with a silencer is as quiet as you can get with a centerfire rifle. 6mm ARC. The newest on the scene is the 6ARC, the Advanced Rifle Cartridge developed by Hornady. The goal of the 6ARC was to extend the range of the … What is the quietest 300 blackout suppressor, .300 AAC Blackout is hands-down, one of the coolest alternative AR-15 cartridges on the market today. ... Add a suppressor to control the gunpowder explosion, and your rifle just became one of the quietest weapons on the face of the planet. Barrel and Twist RateEverything you need to build a .300 BLK AR-style rifle is readily available. You can ..., Aug 31, 2023 · The YHM R9 is a lightweight, extremely compact 9mm suppressor that’s made from fully welded 17-4 stainless steel. Due to its tough construction, it’s rated for far more than 9mm, though! The R9 is good to go on 300 Blackout, 223/5.56, 6.5 Grendel, 350 Legend, and even 308 Winchester on a 16-inch or longer barrel., or $249.75 with an eZ-Pay Plan. The most versatile suppressor in the Banish line, the Banish 30 works with all of your rifle calibers from .17 to .30 caliber magnums. Modular Suppressor ( 7″ or 9″) Below hearing safe. Multi-Caliber .17 to .300 WBY. Length: 7” or 9”., SilencerCo’s Omega 300 is the lightest, shortest, quietest, full-auto-rated, titanium silencer in its category. If you like to have choices and options, it even comes complete with direct thread and fast-attach mounts, as well as a removable Anchor Brake to reduce recoil, which can be replaced with a flat front cap if you don’t need the brake., There are a number of different hunting cartridges out there, but one that’s proven is from Barnes. Barnes is a premium ammo, and it comes at a premium price, but the payoff is ethical hunting, and that makes it worth the extra cents. 4. Federal Premium Power-Shok .300 AAC Blackout 150 grain. Runner up for Hunting., The .300 BLK has easily been the most successful new caliber in the last 20 years. Besides the easy conversion between 5.56 and .300 BLK, the .300 BLK does a lot the 5.56 can’t. First off, it’s a very versatile load with projectiles weights ranging from 110 grains to 220 grains. (L to R) 5.56 NATO, .300 BLK, .30 Carbine., As technology continues to advance, so does the need for reliable power sources. Inverters have become an essential component in many households, providing a backup power supply du..., SilencerCo’s push-button locking system makes this quick and repeatable! The added volume of this unique design also makes this one of the quietest 45 suppressors. Rated for use on 9mm, 40 S&W, 10mm, and 45 ACP pistols as well as on 300 Blackout carbines and rifles., Product Description. The AAC 762-SDN-6 is a top-tier suppressor designed for 7.62x51mm and 300 AAC BLACKOUT firearms that showcases compactness, fast attachment capability, versatility, and durability. It's shorter than its predecessor (the 7.62-SD), features a durable Inconel baffle stack, and performs exceptionally across multiple calibers ..., The Custom .300 Blackout is available in both rifle and braced pistol configurations. They come with free-floated M-LOK rails, a 3.5-pound flat-face trigger, Magpul furniture, and a set of MBUS sights to top …, Gemtech GMT-300BLK Suppressor Review. Gemtech has been in the …, The top three quietest microwave ovens as of 2015 are the Panasonic Compact Size 0.8 Cu. Ft. Microwave oven, the West Bend 0.9 Cu. Ft. Counter-top Microwave Oven and the LG 1.5 Cu...., Today we took a look at four different suppressors from Dead Air and determined which one was best at reducing the report of 300 Blackout SubSonic. ... we took a look at four …, Jun 27, 2019 · One popular choice is using a .30 caliber silencer to shoot rounds such as .308/7.62 NATO, and 300 AAC BLK, but also using it to shoot smaller .223 and 5.56 NATO rounds. Even though a .30 Cal silencer will suppress a gun shot from a smaller caliber, the sound isn’t as suppressed as it would if the shooter were using a model made exclusively ..., What is the .300 Blackout quietest suppressor? The Gemtech GMT .300 Blackout Suppressor is the best pick. If used with supersonic ammo, it will feature a noise reduction of 36 dB, while subsonic ammo will feature a noise reduction of 39 dB. In both cases, it provides one of the highest noise reductions amongst its competitors., SILENCER SATURDAY #73: The Best Suppressor Ammo. Purchasing a silencer is an expensive process – by the time you find the right make and model and pay your NFA tax, you’ve already shelled out between $500 and $1,000. However, consider the fact that that even moderate amounts of shooting will rack up a similar price tag in just a …, Dead Air Armament Sandman-S. One of the shortest 300 Blackout suppressors available is the Dead Air Armament Sandman-S Suppressor. Additionally, it makes very few performance concessions in exchange for a smaller form factor. This suppressor is short and light, measuring just 6.8 inches in length and 18.5 ounces in weight., What Is The Quietest Dead Air Can For 300BLK? Caleb Downing. 28.6K subscribers. Subscribed. 834. 52K views 1 year ago. Today we took a look at four different suppressors from Dead Air and..., The Perfect .300 Blackout Suppressor. From AR style pistols to an increasing number of bolt action and even single shot rifles, the .300 Blackout has become a popular .30 caliber round. A big part of that popularity is the ease with which it can be suppressed., Lower-pressure, slower-moving cartridges like .22lr or subsonic 300BLK will be quieter than fast-moving high-pressure rounds like .300 WinMag or 5.56. There are a few reasons for this., Shorter barrels are great for suppressors because the overall length will remain manageable. However, if you are after the quietest setup possible a longer barrel with a longer suppressor (generally) will be quietest. A 16 inch 300blk with a sandman L will be quieter than a 7 inch with a sandman k., Can is going to be for a Daniel Sefense PDW (AR pistol, 300 blackout, 7 inch barrel.) Setup may eventually be used as a patrol rifle for general Leo use, (pending agency approval) so length and weight are definite considerations. Out of everything I’ve looked at, the SilencerCo Omega 300 is seems to fit the bill perfectly, except that it’s ..., A 300 Blackout integral rifle silencer system as it should be made: Light, Fast, Accurate and above all: Quiet. The original Liberty Suppressors Leonidas Ti was built from the need for a 300 Blk suppressor built specifically to maximize the performance of this cartridge for absolute suppression. Now, the Leonidas Gen 2 builds on that legacy., Apr 7, 2019 · The quietest I’ve shot has been the 220gr Freedom Munitions HUSH 300 blackout. Luckily, they had it at Gander Outdoors last summer for about $45 a box on the shelf during a sale. It’s $59.84 for 50 rounds from Freedom Munitions. (The HUSH was also noticeably quieter than some SilencerCo 220gr Harvester I compared back to back as well.), It is pretty crazy how quiet 300 blackout suppressed is. Help me improve my content... First time shooting a pistol chambered in 300 blackout with a suppressor. It is pretty crazy how quiet 300 ..., ll cover my custom 300 blackout build, shooting it suppressed using the surefire SOCOM 300sps and subsonic ammunition. This is by far the quietest AR I own a..., 2 Nov 2017 ... ... 300 blackout with subsonic ammo and the SilencerCo Omega suppressor ... 300 AAC Blackout ... The Quietest and Most Satisfying Round We Have Ever ..., Best QD 7.62 Suppressor – Dead Air Sandman-S. Because it is a common tactical and military cartridge, we expect most 7.62 shooters to have some sort of semi-auto rifle, sometimes with an NFA-regulated short barrel. With that in mind, we looked for a suppressor designed for those kinds of gun owners. The Dead Air Sandman-S is so …, 8 Apr 2023 ... ... Suppressor is a surefire socom 762 mini and ... The Quietest and Most Satisfying Round We Have Ever Shot ... 300 AAC Blackout Suppressed. hickok45 ..., Posted by Alice Jones Webb on Aug 18th 2020. .300 AAC Blackout is hands-down, one of the coolest alternative AR-15 cartridges on the market today. This wicked cartridge is more than capable of dropping whitetails at 100 yards and ringing steel targets farther than that. And when you use subsonic ammo, the loudest sound you’ll hear is the ..., A 300 Blackout integral rifle silencer system as it should be made: Light, Fast, Accurate and above all: Quiet. The original Liberty Suppressors Leonidas Ti was built from the need for a 300 Blk suppressor built specifically to maximize the performance of this cartridge for absolute suppression. Now, the Leonidas Gen 2 builds on that legacy., 29 Apr 2022 ... Full review of the quietest close range sniper rifle. The B&T 300 SPR., Mar 6, 2024 · 300 blackout Developed by AAC to replace 9mm carbines, the 300BLK cartridge is a marvel of modern ballistics. It uses a .223 case, chopped down and resized to fit a .308 bullet, allowing it to feed and function properly in a standard AR15 receiver and with standard magazines; all that is required is a barrel change.