B5 Systems Modular Picatinny Stock – AR-15/M16 Platform

The B5 Systems Modular Picatinny Stock delivers a stable shooting platform with integrated rail space for mission-critical accessories. Built for precision shooting and tactical applications, this stock features a full-length Picatinny rail on the underside, allowing you to mount monopods, sling attachments, or other equipment without adding separate adapters. The reinforced cheek weld provides consistent sight alignment across iron sights and optics.

Constructed from reinforced polymer with a textured surface for secure shouldering, the stock installs on any mil-spec carbine receiver extension tube. Six positions of length-of-pull adjustment accommodate different body types, shooting positions, and gear loadouts. Anti-rattle design eliminates play between the stock and buffer tube for a solid lockup that won't shift under recoil.

• Type: Adjustable buttstock with integrated Picatinny rail
• Compatible Firearms: AR-15, M16, and mil-spec carbine buffer tube platforms
• Material: Reinforced polymer
• Finish: Black
• Adjustable: Yes – 6 positions
• Installation: Mil-spec carbine buffer tube required, standard stock pin retention