Leapers, Inc. - UTG Model 4, Combat Ops S2, Stock Kit, 6-Position Mil-Spec Stock Assembly, includes Extension Tube, Buffer, Buffer Spring, Tear-drop Ring and Castle Nut, Black Finish RBUS2BM
Leapers, Inc. - UTG Model 4 Combat Ops S1, Stock Kit, 6-Position Mil-Spec Stock Assembly, includes Extension Tube, Buffer, Buffer Spring, Tear-drop Ring and Castle Nut, Black Finish RBUS1BM
Leapers, Inc. - UTG Model 4, Stock, Fits AR-15, Fixed Stock Assembly, with A2 Extension Tube, Recoil Spring, Buffer Assembly, Stock Spacer, and Screw, Black Finish RB-T469B
Luth-AR Fixed Rifle Length Buffer Tube Complete Assembly For AR-10 Rifles, with Buffer, Buffer Tube, & Spring BAP-308
Luth-AR Fixed Rifle Length Buffer Tube Complete Assembly For AR-15 Rifles, with Buffer, Buffer Tube, & Spring BAP-1
Luth-AR Mil-Spec Carbine Buffer Tube Complete Assembly ForAR-10 Rifles, with Buffer, Buffer Tube, & Spring 308-M-BAP
Luth-AR Mil-Spec Carbine Buffer Tube Complete Assembly For AR-15 Rifles, with Buffer, Buffer Tube, & Spring 223-M-BAP