Perfect for building a .22 LR AR, this BANSHEE(TM) Mk4 pistol lower replaces the FASTBACKbuffer tube and RIPBRACEfound on other CMMGAR pistols with our pic rail receiver end cap. By removing the buffer system, not needed for dedicated .22 LR uppers, weight is reduced, and the picatinny end cap rail gives shooters the option to attach accessories like QD sling points or folding Pistol Braces. Pic rail end cap Mk4 pistol lowers are available in seven different Cerakote finishes and come outfitted with a variety of meticulously crafted CMMG parts and accessories, including:ZEROED Pistol GripZEROED Trigger GuardZEROED 60deg/90deg Ambi SafetyZEROED Ambi Mag CatchZEROED Extended Mag Release ButtonZEROED AR15 Bolt CatchReceiver Pic Rail End CapLifetime Quality GuaranteeWe aim to please, that's why every CMMG product is backed by our Lifetime Quality Guarantee against material and workmanship defects. Learn More.