JP Enterprises Enhanced AR-15 Buffer Tube - Carbine

Aero Precision AR-15 Enhanced Carbine Buffer Tube

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

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

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

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

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

TacFire H2 AR-10 Rifle Buffer Tube Kit Black