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

MilSpec/GI AR-15 6 Position Carbine Buffer Tube - Black

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

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

TacFire 6-Postion Mil-Spec Buffer Tube Kit w/Dual Loop End Plate, Black

White Label Armory AR-15 Carbine Buffer Tube 6 Position Mil-Spec

Guntec USA AR15 A2 Buffer Tube Kit Aluminum Rifle Length Matte Ar15

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