Luth-AR BS-11 A2 AR-15 223/5.56 Rifle Buffer Body

The Luth-AR BS-11 is the A2 Rifle Standard Buffer Body, a mil-spec replacement buffer designed for the AR-15 platform chambered in 223 Rem / 5.56 NATO.

Built to drop into a standard carbine buffer tube, this buffer body is machined from durable aluminum for reliable cycling and long service life. It measures 3.25 in tall and weighs 3.0 oz, matching the standard carbine buffer weight used in mil-spec AR-15 rifles.

The BS-11 is a correct choice when building a carbine, replacing a worn buffer, or simply keeping a spare on hand. It fits any AR-15 lower running a standard carbine buffer tube and spring assembly, making it a straightforward drop-in component for 223 / 5.56 builds.