VLTOR 5 Position Receiver Extension - AR15

Vltor Carbine/collapsible Buttstocks will only fit MilSpec Receiver Extensions, such as Colt, LMT, CMT and Vltor. Specifications: Receiver is designed for carbine spring and buffer (spring and buffer sold separately) Receiver extension is Mil-Spec dimensioned and will only accept M4 type Mil-Spec buttstocks Weighs 3.8 oz