This is a Spike's Tactical Buffer known as the ST-T2, model SLA00T2.
Looking for a heavy buffer to replace your standard carbine buffer? Well" we came up with something that offers the HIGHEST performance at a reasonable price. The ST-T2 buffer is one of the softest shooting" smoothest" and quietest buffers on the market; not to mention it looks awesome! It is 100% maintenance free!
Features:
Black anodized finish
Solid aluminum bullet
Crushed Tungsten Mil-Spec bumper;4 ounces;Fits AR
