Cry Havoc Takedown Kit QRB Quick Detach Barrel

Cry Havoc Takedown Kit QRB Quick Detach Barrel

Cry Havoc 308 AR Upper Receiver Takedown Kit
Cry Havoc QRB 308 AR Upper Receiver Takedown Kit

Cry Havoc Takedown Kit (QRB Barrel Kit)

Cry Havoc Tactical takes their QRB (Quick Release Barrel) Upper Receiver Takedown Kit and scales it up for the big guns!
Designed for your AR 308 or 6.5 Creedmoor the QRB allows you to quickly detach the barrel giving you the ability to store or carry your rifle in a much-reduced profile and then when needed quickly reassemble the rifle while holding within 1 MOA.

Each Cry Havoc Takedown Kit contains complete instructions and all parts to convert your rifle or without drilling or any permanent modifications. Although they recommend installation be done by a Gunsmith, if you can install a barrel on an upper receiver, you can install this kit. Simple hand tools, an Armour’s wrench, and receiver block/vise are all that are needed. Returning your rifle or pistol back to stock is as easy as the installation.

The QRB main body is Hard Anodized Aluminum and the Stainless-Steel hooks, levers, star nut, and gas extension are finished in Black Nitride for maximum durability.

Available from Brownells

Once the QRB Kit is installed, it is amazingly quick to assemble your rifle or pistol without the worry of damaging your gas tube. The operator would simply lock the bolt back, insert the barrel extension into the receiver, rotate the barrel until the alignment pin enters the alignment hole, and then seat the barrel in place. Next, hook the two clips on the receiver plate and engage the levers to the closed position, never taking your hand off the pistol grip. Nothing to depress! Just drop the bolt and you are ready to fire… All in less than 6 seconds!

To remove the barrel assembly for storage, first, remove the magazine, lock the bolt back, check for an empty chamber, pull levers away from the handguard, remove hooks from the receiver plate and pull the barrel away from the receiver. Just that simple. No barrel rattling around in the handguard or gloves needed! Make sure to check out the videos in the Media Tab to see these steps happen in real-time. You will be amazed.

  •  The QRB Kit is only compatible with Free Float Hand Guards 2.2″ wide or less and will add 1.7″ to the length of the Hand Guard.
  • Purchase the correct kit by selecting the proper length gas tube to your barrels gas system length.

Cry Havoc Takedown Kit 308 QRB (308 AR Upper Receiver Takedown Kit)

From Cry Havoc Tactical

Our Cry Havoc Takedown Kit currently in use by the United States Air Force, utilizing the GAU-5A Aircrew Self Defense Weapon is the most compact and effective survival rifle for a downed Pilot. Used in the ACES II Ejection Seat Survival Kit, the GAU-5A has four magazines totaling 120 rounds, allowing a downed pilot enhanced protection. A QRB Kit-equipped AR-15 Carbine or Pistol gives you the smallest possible package with NO drilling or modifications to your existing AR Platforms! Easy ONE HAND operation. You want compact – You got it!

Now you can have The Ultimate Take Down Rifle! Our Patented 308 QRB System is designed to work on YOUR gas impingement DPMS/SR25 style rifle with a Free Float Hand Guard system 2.2″ wide or less and will add 1.7″ to the length of the Hand Guard. Now the Rifle System can break down to just the length of the barrel, meaning a 16″ 308 Carbine becomes two pieces under 17″ total, WITHOUT the worry of a full-size gas tube protruding beyond the barrel end, just waiting to be damaged!

Other possibilities available are the ability to do a 12.5″ pistol with a LAW Tactical folding “stabilizer” and have a 13″ 308 Package Pistol capable of firing 150-grain bullets at 2450 fps. Hard to match that with a 300 Blackout firing a 150 grain out a 16″+ barrel. This IS compact firepower!!! Watch your eyebrows! The United States Patent # 6829855

Now for your 308 or 6.5 Creedmoor. Have your large caliber with you at all times. The “Big Boy” QRB allows you to remove the barrel of your DPMS/SR25 Style rifle or pistol quickly. NO drilling or modifications needed!

  • Able to take along your AR308 style rifle in a small package.
  • Assemble converted rifle in seconds, even in total darkness.
  • Easily convert to multiple calibers – like 308 NATO to 6.5 Creedmoor.
  • Holds within 1 MOA of original rifle.
  • Easy install; Can be done without special tools if on a new install. No permanent modifications.
  • Proudly made in the USA – that means something to us.

Includes Barrel Plate, Receiver Plate, Gas Extension, and Gas Tube.

The 308 QRB Kit can only be used on Barrels with a maximum outside diameter of 1.200″ and Free Float Hand Guards with a maximum width of 2.2″ Also the QRB will add 1.5″ to the length of your free-floating handguard.

BSF 308 Barrel Carbon Fiber Barrel 16 Inch Black

BSF 308 Barrel Carbon Fiber Barrel 16 Inch Black

BSF Barrels .308 Winchester Carbon Fiber Barrel 16 Inch
BSF Barrels 308 Winchester Carbon Fiber Barrel 16 Inch

BSF 308 Barrel .308 Winchester Carbon Fiber 16 Inch Black

I have wanted a carbon fiber wrapped .308 barrel for quite some time, but three things have stopped me up until this point, necessity, price, and accuracy. For this build, the necessity comes from the desire to reduce weight, and the 16″ carbon fiber-wrapped, fluted barrel weighs nearly 25% percent less than my similar Criterion Hybrid .308 barrel. The price, well it is what it is. Regarding accuracy, some carbon fire barrels have a reputation for stringing when they get hot, BSF does not.

The .308 Winchester chambered 16 inch BSF Carbon Fiber Barrel appears to be the obvious choice for my new “CT Other Lightweight 308 AR build“. I’m looking forward to completing the build to see what this barrel can do.

Note: As I have mentioned repeatedly I like to support vendors who make good products and are responsive to customers. When I decided to order a barrel there was zero stock. I sent off an email to BSF and within hours I was able to claim the last .308 Winchester blank allotted to their next barrel run. True to their word forty days later I had my awesome carbon fiber wrapped barrel in hand. BSF is a great company to deal with, and they stand by their barrels.

Available from Palmetto State Armory, Brownells, and Optics Planet

BSF 308 Barrel 308 Winchester Carbon Fiber Barrel 16 Inch Black

Impressive Accuracy From a Lightweight, Futuristic Looking BSF 308 Barrel

BSF builds their .308 match-grade carbon fiber barrels with exceptional attention to detail that ensures you’ll achieve the best possible accuracy from your 308 AR-pattern rifle without getting a hernia lugging it around! BSF 308 barrels are turned from ordnance-grade 416R stainless steel, then given a roll-wrapped, tensioned, carbon fiber sleeve. The sleeve keeps weight down while providing excellent rigidity, coupled with enhanced cooling.

Why the sleeve method, rather than simple carbon fiber wrapping? The BSF folks believe wrapping traps heat and, as a result, is more likely to delaminate. Further, BSF uses a special carbon fiber that expands at the same rate as the 416R, and holes drilled into the jacket allow air to circulate around the barrel and vent heat quickly. Less heat distortion means far less risk of accuracy fade as your .308 Winchester chambered AR308 barrel heats up.

  • Fits .308 sized AR upper receiver
  • 5R button-rifled
  • 5/8″-24 TPI muzzle threads
  • .875″ O.D.
  • Barrel extension included
  • Requires RIFLE-length gas tube
  • Weight 28.4 ounces (16″ Fluted)
  • 11° Target Crown
  • DPMS Platform

BSF offers their .308 Winchester carbon fiber match barrels with a 1-10″ rifling twist effectively stabilizes that widest variety of popular bullet weights. And each barrel is thoroughly inspected by an experienced technician before leaving the BSF shop, ensuring you get a BSF 308 Barrel that’s as accurate as it is good looking!


From the Manufacturer

ALL AR-10 BARRELS ARE DPMS PLATFORM

Current lead times on our barrels can be up to 12+ weeks. Some calibers will ship sooner than others but at this point, we are no longer guaranteeing that a barrel will be shipped by a certain date due to delays in materials for our production team and high volume of orders. 

After turning down the barrel, we jacket a 416R Stainless steel match barrel in a roll-wrapped carbon fiber sleeve and load it under tension.  We use this jacketing method rather than wrapping the barrel in carbon fiber because this method of wrapping has been proven to trap heat and cause delamination.

 The carbon fiber we use is specially designed to move at the same expansion rate as 416R stainless steel. We machine slots into the carbon fiber allowing air to move around the barrel and vent heat quicker without any delamination issues.  Using the Carbon Fiber this way keeps the rifling straighter the warmer the barrel gets because it’s under tension. This allows us to maintain superior stiffness and strength while keeping the barrel extremely lightweight.

Visit BSF Barrels

FAXON FIREARMS BIG GUNNER PROFILE 308 AR DROP-IN BARREL

FAXON FIREARMS BIG GUNNER PROFILE 308 AR DROP-IN BARREL

Picture of a FAXON FIREARMS BIG GUNNER PROFILE 308 AR BARREL

FAXON FIREARMS BIG GUNNER PROFILE 308 AR BARREL .308 Winchester

The Faxon Firearms Big Gunner .308 Win. Barrel’s profile is a marriage of Faxon’s Government and Pencil profiles that gives balance of manageable weight and high accuracy potential. It has the Government taper from the barrel extension to the gas block, then transitions to a Pencil profile from the block to the muzzle. Keeping weight at the rear maximizes rigidity and resistance to heat distortion, while removing it up front moves the center of gravity to the rear, keeping your “AR-308” nicely maneuverable.

Each Big Gunner .308 Win. barrel is machined from triple stress-relieved 416R stainless steel, and finished it with a tough, wear-resistant matte black QPQ Nitride finish.

  • Fits DPMS LR-308 Gen1 pattern upper receiver OR Armalite AR-10 upper when used with Faxon Bolt Carrier Group (not included)
  • 5R rifling with 1-10″ twist ensures both accuracy & easy of cleaning
  • 11° target crowned muzzle
  • 5/8″-24 threaded muzzle
  • Each barrel individually checked for headspace with custom gauges

Faxon Big Gunner .308 Win. Barrels are available in 16″ length drilled for a mid-length gas tube, as well as 18″ and 20″ lengths drilled for a standard rifle gas tube.

Gun Tech Note: These barrels are chambered for .308 Winchester. 7.62×51 NATO ammo requires deeper head spacing but will normally will fit the chamber and function. However, Faxon does not guarantee the function of 7.62×51 ammunition, particularly with tight, “mach” .308 Win headspacing.

CRADDOCK PRECISION AR-10 308 AR BARRELS

Bartlein Barrels recommends Craddock Precision for 308 AR/AR308 and AR-10 barrels. Yes you read that correctly Craddock Precision offers replacement AR-10 barrels. When one of the best if not THE barrel makers makes a public recommendation it’s worth noting.

Many AR-10 and 308 AR shooters send Bartlein Barrel blanks to Craddock Precision for custom barrel work. (See service below)

CRADDOCK PRECISION AR-10 308 AR/AR 308 BARRELS

CRADDOCK PRECISION AR-10 308 AR BARRELS

CRADDOCK PRECISION AR-10 308 AR BARRELS

Craddock Precision’s .308 barrels are available for both Armalite AR-10 and  DPMS style rifles. Using Craddock Precision’s custom .308 match chamber the AR-10, AR 308 style barrels will reliably and accurately shoot 7.62 NATO or .308Win ammo. Rifle barrel muzzles are threaded 5/8 x 24. The current lead time is approximately 3-5 weeks. Calibers for AR10/LR308: .243WIN, .260REM, 6mm Creedmoor, 6.5Creedmoor, 7mm-08, and .308WIN Match

Craddock Precision Custom Services

Barrel Fluting – Craddock Precision offers a variety of flutes, from diamond to flat flutes we do it all. Fluting prices vary, but they depend on the style of fluting along with how long the barrel is. Call or send and email to request a price on fluting.

Time & Blend Muzzle Device to Barrel – Time and blend for the look of a seamless muzzle. Timing the break to the muzzle will help give it a distinct look and help the break function properly, blending the brake onto the barrel will give it that seamless look.

Thread Barrel – We can thread your existing AR15 or AR10 barrel to fit nearly any muzzle device or suppressor.

Re-crown Barrel – The crown is critical to the potential accuracy of the given barrel. We are happy to rework poor factory crowns or repair any damaged muzzles. Any given barrel we can cut down and recrown also we use a 11 degree target crown but are happy to crown to your specifications.

Assemble 308 AR, AR 308, AR-10 Upper Receiver – Craddock Precision will completely assemble an upper receiver’s for valued customers. They only do this if the customer supplies their own parts for the upper, the charge on this assembly would be $50.

Coating – Craddock Precision offers a variety of firearms coatings to meet any budget and demand. Cerakote is extremely wear resistant, virtually untouched by chemicals, and will not rust. This will generally add 2-3 weeks on your lead time.

308AR AR-10 Bolt Carrier Group Link
308AR AR-10 Scope Link
308AR AR-10 Trigger Link
308AR AR-10 Technical Link

PROOF RESEARCH 308 AR CARBON FIBER BARRELS

PROOF RESEARCH 308 AR CARBON FIBER BARRELS

PROOF RESEARCH 308 AR CARBON FIBER BARRELS

Virtually impervious to weather, nicks, dings or scratches, and up to 30% lighter and 300% stiffer than equivalent weight steel AR barrels, PROOF Research 308 AR carbon fiber barrels open up new possibilities in AR 308 performance.

PROOF Research 308 AR Carbon Fiber Barrels

At PROOF Research we’re proving AR 308 carbon fiber wrapped rifle barrels aren’t just a lightweight alternative to traditional steel rifle barrels, but that they provide superior performance, including extreme accuracy, unprecedented durability and increased barrel life. By combining our unique manufacturing process with advanced technology composite materials and thermo-mechanical design principles, we’ve accomplished what others have failed to do in the past—match-grade carbon fiber rifle barrels that weigh a fraction of traditional steel rifle barrels while compromising nothing. They’re not just lighter—they’re better.

  • These carbon fiber-wrapped barrels provide a high-end alternative to traditional barrels while still maintaining extreme accuracy, performance and durability.
  • Match-grade accuracy
  • Improved heat dissipation for cooler and longer lasting barrels
  • No point-of-impact shift during high-volume fire
  • Reduced harmonic barrel vibration
  • More about The Science behind there process here:
308AR AR-10 Bolt Carrier Group Link
308AR AR-10 Scope Link
308AR AR-10 Trigger Link
308AR AR-10 Technical Link

Proof Research builds PR (308 AR, AR 308 barrels) with standard DPMS (TM) compatible barrel extensions and gas system lengths. Please check with the manufacturer of your rifle platform to see if these configurations are compatible.

Proof Research Recommends the JP Rifles High Pressure Bolt JPEB-308HP

JP Rifles JPEB-308HP

JP High Pressure EnhancedBolt™ Bolt Assembly
Caliber: .308 Win. caliber
Finish: Chromium Nitride

This bolt assembly is compatible with the JP LRP-07 and the DPMS LR-308 platforms (or clones thereof) only and cannot be used to replace bolts in the Armalite AR-10 platform (or clones thereof). This bolt uses a specialized firing pin that is not compatible with other bolts nor can it use standard .308 firing pins.

WARNING: The JP .308HP bolt does not allow for the use of excessive pressure, overloaded ammunition that exceeds SAAMI specifications. When evaluating new ammunition, always start on the low- to mid-range of any published load data and work up. A good indicator of working pressure is the primer retention on the subsequent loading of a case. A noticeable loss of primer pocket tension indicates that your ammunition has excessive pressure and has overworked the case.

PROOF Research 308 AR Carbon Fiber Barrels

Criterion Barrels Inc CBI 308 AR Barrels

Criterion Barrels Inc CBI 308 AR Barrels

Criterion Barrels Inc CBI 308 AR Barrels

CBI 308 AR Barrels

Criterion Barrels Inc (CBI Inc) long time friend of 308AR.com and our sibling sites (AR15 Tactical, Modular Rifle and Combat Rifle). CBI is always hard at work manufacturing some of the best 308 AR rifle barrels in business. CBI 308 AR barrels are proof that you don’t have to spend a fortune on a 308 barrel to get sub moa accuracy. As mentioned previously CBI 308 AR Barrels are the heart of Fulton Armory Titan 308 and American Defense Manufacturing (ADM) UIC semi automatic rifles.

Today we are pleased to see Brownells carrying and expanded line of Criterion 308 AR Barrels. This is actually a pretty big deal. CBI is careful on how they market their 308 AR barrels. There is no competition between Fulton Armory, American Defense Manufacturing and the Criterion Barrel Inc website. Visiting the three websites will result in different 308 barrel offerings

Criterion Hybrid contour match grade .308 AR barrels offer an ideal configuration for those seeking extreme accuracy without the added weight of a heavy barrel contour. These .308 AR barrels feature a M118LR chamber. The longer throat of the M118LR enables Criterion .308 AR barrels to improve upon the performance of loads utilizing heavier bullets, serving to reduce wind drift when fired at longer ranges.

Note: highlighted links all point to the Criterion Barrels Section of the Brownells website. Too hard to keep ever changing links updated.


CRITERION BARRELS INC – 308 AR STAINLESS STEEL BARRELS

This configuration is designed to accommodate either .308 Winchester or 7.62×51 ammunition, and comes complete with an installed barrel extension. CBI .308 AR barrels are compatible with DPMS, Remington, and Fulton Armory pattern  rifles, and accept muzzle devices with a 5/8×24 thread.

An indent is provided opposite the gas port to enable easy installation. Chambers are finished, but headspace should be checked prior to installation. Stainless steel variants are available in 20 and 22 inch lengths. These barrels are button rifled, and have been hand lapped to ensure consistent bore uniformity. The 20″ Hybrid utilizes a 0.750″ gas block, while the 22″ Hybrid utilizes a 0.875″ gas block – gas blocks NOT included.


CRITERION BARRELS INC – 308 AR CHROME LINED BARRELS

This configuration is designed to accommodate either .308 Winchester or 7.62×51 ammunition, and comes complete with an installed barrel extension. CBI .308 AR barrels are compatible with DPMS, Remington, and Fulton pattern rifles, and accept muzzle devices with a 5/8×24 thread. An indent is provided opposite the gas port to enable easy installation.

Chambers are finished, but headspace should be checked prior to installation. Chrome lined variants are available in 16, 18 and 20 inch lengths. These barrels are button rifled, and have been hand lapped to ensure consistent bore uniformity.


CRITERION BARRELS INC – 308 AR HYBRID BARRELS, 6.5 CREEDMOOR

Criterion Hybrid contour match grade 6.5 Creedmoor AR barrels offer an ideal configuration for those seeking extreme accuracy without the added weight of a heavy barrel contour. Featuring a flatter trajectory and higher ballistic coefficient than the traditional .308 Winchester alternative, the 6.5 Creedmoor has grown in popularity with many long range shooters.

Designed to be compatible with DPMS, Midwest Industries, Remington, and Fulton Armory pattern rifles, these 6.5 Creedmoor barrels can be directly swapped with factory .308 barrels. Button rifled and hand lapped to ensure consistent bore uniformity, Criterion 6.5 Creedmoor AR barrels incorporate a 5/8 x 24 muzzle thread and finished chamber.

Headspace should be checked prior to installation by a qualified gunsmith. NOTE: The 18″ 100-019-351 utilizes a .750″ gas block while the 22″ 100-019-352 utilizes a .875″ gas block (NOT include for either).


308 AR Bolt Compatibility

Note: Many .308 AR bolt manufacturers advertise their bolt as compatible with DPMS pattern .308 AR rifles, lug and bolt face tolerances often vary widely between different manufacturers. This is in opposition to the AR-15, where there is a uniform industry standard. Criterion barrels are gauged at the factory with Fulton Armory .308 AR bolts. We have also had success in demo rifle testing with bolts from DPMS and JP Enterprises. If you have any questions regarding bolt compatibility, please email us at contact@criterionbarrels.com.


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Magpul 25 Round 308 PMAGS, 308 AR PMAGS For Sale Cheap, AR308 Magazines

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