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Cross Machine Tool Extended AR-15 Pistol Buffer Weight - 7.7 Oz.

Cross Machine Tool Extended AR-15 Pistol Buffer Weight - 7.7 Oz.

CMT · Buffer Tubes & Springs

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Best price

$39.99at AR15Discounts

checked Nov 10, 2026

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StorePriceAvailabilityBuyAdd to build
AR15Discounts Best price $39.99checked Nov 10, 2026 Check store Buy at AR15Discounts
Dirty Bird $39.99checked Nov 10, 2026 Check store Buy at Dirty Bird

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Price history

Dashed line = out of stock. Tracking since Oct 28, 2026.

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AR15Discounts$39.99$39.99$39.99
Dirty Bird$39.99$39.99$39.99

Since Oct 28, 2026.

About this part

The Cross Machine Tool Extended AR-15 Pistol Buffer Weight - 7.7 Oz. is an AR-15 buffer part from CMT. It's sold by 2 stores, all at $39.99.

Fits and works with

Buffer system
Pistol · Buffers and springs

Specifications

Manufacturer
CMT
Type
Buffer
Platform
AR-15

From the manufacturer

Pistol Caliber AR-15s are extremely fun and useful but they come with their own issues due to the nature of the direct blow back system. One of the easiest ways to remedy an unreliable PCC is to install a heavier buffer weight designed specifically for the direct blow back gas system. The Cross Machine Tool AR-15 pistol caliber buffer weighs 7.7 ounces to help slow down the bolt as it cycles to ensure that it extracts and ejects the spent casing properly. The heavier weight also helps to prevent it from slamming into the rear of the receiver extension tube which can increase wear on your parts. Not only does the increased weight help with reliability, it can also help reduce the harsh recoil typical with pistol caliber direct blow back systems. The extended length of this buffer is designed to be use with carbine length buffer tubes and does not require a spacer. If you are building a 9mm AR-15, eliminate the possibility of reliability issues right from the start with the CMT extended length pistol buffer weight. Features: 7.7 ounce extended length Designed for carbine length buffer tubes Only for pistol caliber direct blowback systems Solid stainless-steel construction Increases reliability while decreasing felt recoil No buffer spacer required Can be used with standard carbine springs Cross Machine Tool Co., utilizing the latest machining technologies, offers high quality products that you'll be excited to own. Cross Machine Tool is a veteran owned business that takes pride in manufacturing products you will own. CMT products exceed military standards, so you can build the best AR style rifle possible.

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$39.99 at AR15Discounts
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