UTG Pro AR-15 Receiver Extension Tube, 6-Position, 6061-T6 Aluminum, Matte Black Anodized.

UTG Pro AR-15 Receiver Extension Tube is Mil-Spec, CNC-machined from 6061-T6 aluminum, and finished with a matte black Type III Class II hard coat anodized finish. Designed for AR-15 carbines using carbine buffers and springs and collapsible stocks. Six-position receiver extension for AR-15 carbine platforms. - Material: 6061-T6 aluminum - Finish: Black Hardcoat Anodized (Type III Class II) - Compatibility: AR-15 platforms using carbine buffers and springs and collapsible stocks - Position: Six-position Mil-Spec tube - Made in USA