UTG Pro Mil-Spec 6-Position AR-15 Receiver Extension Tube – Black

Description

This is the workhorse buffer tube that lets you finish out an AR-15 lower without overthinking it. The UTG Pro Mil-Spec 6-Position Receiver Extension Tube sticks to the standard mil-spec diameter, so it plays nice with the collapsible stocks most folks already own or plan to pick up. It's the black hardcoat version from Leapers, made right here in the USA, and it carries the same lifetime warranty as the rest of the UTG Pro line.

What Sets the UTG Pro Extension Tube Apart

The tube is CNC machined from 6061-T6 aircraft-grade aluminum, and the threads are precisely rolled rather than cut. Rolled threads tend to hold up better under repeated stress, which matters at the spot where the tube meets your lower receiver. The finish is a matte black Type III Class II hardcoat anodize, so it shrugs off scuffs and holds its color alongside the rest of your build. Leapers runs these to tight tolerances, and that shows up as a clean, snug fit with the buttstock riding over the tube.

Buffer Compatibility on the UTG Pro Tube

This is a carbine-length receiver extension with six adjustable positions, giving you room to dial in length of pull for different shooters, gear, or shooting positions. It's set up to run AR-15 carbine buffers, AR-15 9mm buffers, and AR308 2.5-inch short buffers, which makes it a flexible pick whether you're building a standard 5.56 carbine or a pistol-caliber setup.

Getting the UTG Pro Receiver Extension Installed

Installation is straightforward for anyone who's assembled a lower before. Keep in mind this is the bare tube, so you'll need a buffer, buffer spring, castle nut, and end plate to complete the assembly if you don't already have them on hand. Once it's threaded on and torqued down properly, it gives your stock a solid, rattle-free foundation to work from.