B5 Systems SIERRA K Stock – AR-15/M16 Carbine

The B5 Systems SIERRA K Stock delivers a streamlined profile with enhanced cheek weld and shoulder contact for faster target acquisition on AR-platform carbines. Its contoured design reduces bulk while maintaining structural rigidity, making it ideal for close-quarters work and dynamic shooting positions.

Constructed from reinforced polymer with a Flat Dark Earth finish, this mil-spec carbine stock installs on any standard AR-15 or M16 buffer tube. Features include an integral QD sling swivel socket, anti-rattle locking system for wobble-free fit, and textured buttpad for secure shouldering. No permanent modification required.

• Type: Fixed-position carbine stock
• Compatible Firearms: AR-15, M16, carbine-length buffer tube (mil-spec)
• Material: Reinforced polymer
• Finish: Flat Dark Earth
• Adjustable: No (fixed position)
• Installation: Drop-in replacement for mil-spec buffer tube, no gunsmithing required