Luth-AR Fixed Rifle Length Buffer Tube Complete Assembly Fits AR-10 Rifles, with Buffer, Buffer Tube, & Spring, Black BAP-308

Timber Creek Outdoors Buffer Tube Kit for AR-15, Red - ARBTKR

Timber Creek Outdoors Buffer Tube Kit for AR-15 - Lightweight and Durable in Blue Finish - ARBTKB

Timber Creek AR Buffer Tube, Black - AR BT BL

Timber Creek Outdoors Buffer Tube Kit for AR-15, Robin's Egg Blue - ARBTKRE

Luth-AR MBA-4 Carbine Stock, Fits AR-15 & AR-10 Commercial and Mil-Spec Dia Buffer Tubes, Black MBA-4

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

GUNTEC AR15 PISTOL BUFFER TUBE KIT ANODIZED BLACK