Technical Specifications Short Recoil/Delayed Blowback operating system 8.5" Cold Hammer - Forged Chromoly steel barrel User-configurable rail system - options include Picatinny segments, sling adapters, polymer rail panels, offset mount, etc LWRCI™ Rail Panels at 3, 6, and 9 with a handstop on the 6 o'clock rail Reversible, non-reciprocating, folding charging handle US-manufactured UMP magazines ships with two 25-round mags AR Selector, bolt catch, grip, and hammer/trigger. Paddle-style mag release, All controls are ambidextrous SB Tactical Folding Subgun Brace with LWRCI Adapter Aluminum and steel construction - no major parts are polymer Hardcoat anodized nitride nickel boron coatings LWRCI™ Ultra Combat Grip Magpul MBUS Pro sights Shoots suppressed using a booster/Neilson device