The Kaw Valley Precision Solid Stainless Steel Heavy Buffer, 7.5 oz, is a blowback buffer made for AR-15 platforms chambered in pistol calibers (Kaw Valley Precision part no. KVP75). Pistol caliber carbines are fun to shoot but hard on the internals of an AR lower, and a properly tuned blowback system is what keeps them reliable. This buffer adds reciprocating mass and dwell time, which slows the cycle of a blowback action and quiets it down. It is a straightforward upgrade for a PCC build, and it is especially useful when running a suppressor.

Key Specifications

• The weight is 7.5 ounces, heavier than a standard carbine buffer for blowback pistol-caliber use.
• Construction is solid stainless steel, which packs the mass into a short body.
• Overall length is 4 1/8 inches, and buffer spacers are not required.
• It is intended for blowback AR systems in 9mm, 10mm, .40 S&W or .45 ACP.
• It is designed only for carbine-length stock and pistol kits.
• The added mass increases dwell time and reciprocating weight, which improves reliability in a blowback setup.
• The solid body eliminates buffer rattle in the tube.

Frequently Asked Questions

Does this buffer need spacers? No. Kaw Valley Precision states that buffer spacers are not required with this 4 1/8-inch buffer.

Which AR systems is it made for? It is made for blowback AR systems chambered in 9mm, 10mm, .40 S&W or .45 ACP, and it is designed only for carbine-length stock and pistol kits.

What does a heavier buffer do in a blowback AR? It increases dwell time and reciprocating mass, which Kaw Valley Precision says reduces wear on critical internal parts and reduces felt recoil.

Buy the Kaw Valley Precision Solid Stainless Steel Heavy Buffer, 7.5 oz

A heavy stainless buffer is one of the least expensive ways to settle a pistol-caliber AR. Order it from our Lubbock, Texas shop for fast direct shipping, and see more AR buffer system parts while you are here.