The Geissele Automatics Premium Mil-Spec Buffer Tube Assembly with Super 42 Spring and H3 Buffer in black (Geissele part no. 08-163B-H3) is a complete carbine buffer system for AR-15 lowers. The tube is machined from 7075-T6 aluminum, finished in Type 3 hardcoat anodize and made in the USA. Geissele pairs it with its Super 42 braided wire spring and an H3 buffer, and the package includes a mil-spec castle nut and end plate. It is a one-box way to upgrade the tube, spring and buffer together.

Key Specifications

• The tube is machined from 7075-T6 aluminum, a rigid and durable material for a buffer tube.
• The finish is Type 3 hardcoat anodize in black, which resists wear and matches most AR lowers.
• The tube is carbine length with a mil-spec diameter, compatible with most mil-spec diameter AR-15 stocks.
• The tube has six stock positions for adjustable length of pull.
• A mil-spec castle nut and end plate are included in the package.
• The spring is Geissele’s Super 42 braided wire design, made from three independent strands of wire.
• The assembly is built around an H3 buffer paired with that spring, and the tube is made in the USA.

Frequently Asked Questions

What is included in this buffer tube assembly? It includes the Premium Mil-Spec buffer tube, a Super 42 spring, an H3 buffer, and a mil-spec castle nut and end plate.

What stocks will fit the tube? The tube is carbine length with a mil-spec diameter, so it works with most mil-spec diameter AR-15 stocks.

What is the Super 42 spring? It is Geissele’s braided wire buffer spring, made from three independent strands of wire that flex separately to absorb energy and reduce spring reverberation.

Buy the Geissele Automatics Premium Mil-Spec Buffer Tube Assembly with Super 42 Spring and H3 Buffer, Black

Replacing the tube, spring and buffer as a matched Geissele set takes the guesswork out of an AR-15 recoil system upgrade. The aluminum tube is hardcoat anodized, the spring is the Super 42 and the buffer is the H3. Order it from our Lubbock, Texas shop with fast, insured shipping, and see more from Geissele Automatics in our AR buffer system parts selection.