B5 SRK EXTENTION KIT BLK

The B5 Systems SRK Extension Kit is designed to provide a durable and reliable buffer tube assembly compatible with the Sierra K line of buttstocks. Crafted from mil-spec materials, this extension kit ensures strength and longevity under demanding conditions. Its black finish offers a sleek, professional appearance that complements a variety of firearm builds.

Manufactured in the USA, the B5 SRK Extension Kit maintains the high-quality standards B5 Systems is known for, making it a dependable choice for those looking to upgrade or replace their receiver extension setup. The kit facilitates secure attachment of the Sierra K buttstock, enhancing overall firearm ergonomics without compromising structural integrity.