B5 Systems Sierra K Receiver Extension, Fits B5 Systems Sierra Extension, Coyote

The Sierra K is a purpose-driven compact stock, optimized for use on PDW and compact weapon systems. Features include reduced overall size and slim cheek profile, snag-free adjustment lever, limited rotation QD and integral fixed sling mounts, internal tensioners, and anti-slip buttpad. Mounts via shortened compact Mil-Spec receiver extension. • Low-Profile Adjustment Latch • Color-Matched Steel Hardware • Mil-Spec Materials and Finishes • Mounts via Sierra K Receiver Extension Kit