Includes: 

(1) Receiver Extension Buffer Tube, 1.19" OD, Pistol W/QD Socket
(1) Nut, Castle Extension Receiver Tube
(1) AR15/M16 Receiver End Plate, QD - Thin Profile
(1) Enhanced Spring, Recoil Buffer, Action, Carbine
(1) Buffer, Recoil, Carbine

Made in USA

*All Damage Industries QD Sockets are guaranteed to work with our proprietary QD Swivels. Our swivels are 100% quality inspected by hand in our QD sockets to ensure fit and function.