Radical Firearms AR-15 Buffer Tube - Carbine

Aero Precision AR-15 Enhanced Carbine Buffer Tube

Luth-AR Mil-Spec Dia Carbine Buffer Tube Complete Assembly Fits AR-15 Rifles, with Buffer, Buffer Tube, & Spring, Black 223-M-BAP

KAK Industry Mil Spec 2-Position Carbine Buffer Tube - Retro

ONE HORSE AR15 Buffer Tube Kit Carbine Buffer

Guntec USA AR-15 MIL-SPEC Buffer Tube Set - Black

Luth-AR Mil-Spec Dia Carbine Buffer Tube Complete Assembly Fits AR-10 Rifles, with Buffer, Buffer Tube, & Spring, Black 308-M-BAP

WMD Guns WMD Buffer Tube Carbine NiB-X Silver Six Position M4 Style Mil Spec