Description
Enhance your firearm’s performance with the B5 SRK-1660 Sierra K Receiver Extension Kit. This complete buffer tube assembly is specifically designed for the Sierra K Buttstock, featuring a reduced-length, mil-spec diameter, 7075 aluminum construction for durability. The kit includes a 5-position receiver extension, a short heavy buffer weighing 3.5 oz, an extra power spring, a castle nut, and a quick disconnect end plate. Upgrade your setup with this reliable and efficient extension kit from B5 Systems.
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