The Geissele Automatics AR-15 premium mil-spec buffer tube assembly with Super 42 H2 in DDC is a complete recoil management system engineered for shooters who demand reliability and durability in their AR platform. This American-made assembly pairs Geissele's rigid, mil-spec buffer tube with their proven Super 42 spring technology—a combination that transforms how your rifle cycles and feels in your hands. Whether you're running a duty rifle, competition gun, or hunting build, this assembly delivers the control and longevity that separates solid setups from great ones.
The buffer tube itself is machined from 7075-T6 aluminum and finished in mil-spec Type 3 hardcoat anodize in Geissele's DDC (Desert Dirt Color), offering corrosion resistance and a professional appearance. At 3.7 ounces, it's built to last without unnecessary weight. The tube features six stock positions, accepts standard mil-spec stocks, and ships with a mil-spec castle nut and end plate—everything you need for a clean install on your AR-15 lower receiver.
The Super 42 spring is where this assembly really shines. Its three-strand design acts like a harmonic damper, allowing each wire to flex independently and absorb excess energy. That means fewer spring failures over thousands of rounds, less of that annoying spring "twang" through the buttstock, and noticeably smoother cycling—especially important when running heavy use, suppressed fire, or steel-case ammunition. You'll feel a 15% increase in average return force compared to standard mil-spec springs, which translates to more reliable feeding and bolt stripping, even when your rifle is dirty or ammunition is marginal.
This is the kind of upgrade that works quietly in the background, making your AR-15 cycle cleaner and last longer. Made in the USA and fully mil-spec compatible, it's a no-compromise choice for serious shooters.
| Brand | Geissele Automatics |
| Product | Premium Mil-Spec Buffer Tube Assembly with Super 42 H2 Spring |
| Color | DDC (Desert Dirt Color) |
| Tube Material | 7075-T6 Aluminum |
| Finish | Type 3 Hardcoat Anodize |
| Weight | 3.7 oz |
| Stock Positions | 6 |
| Spring Type | Super 42 H2 (three independent wire strands) |
| Includes | Buffer tube, Super 42 spring, mil-spec castle nut, end plate |
| Compatibility | AR-15 platform, mil-spec stocks and lower receivers |
| Made In | USA |
Yes. The Geissele premium mil-spec buffer tube is designed to fit all standard AR-15 lower receivers. It conforms to full mil-spec standards and is compatible with mil-spec diameter stocks.
You get the buffer tube, the Super 42 H2 spring, a mil-spec castle nut, and an end plate. Everything needed for installation on a mil-spec lower.
The Super 42 uses three independent wire strands instead of one, which act as a harmonic damper. This design absorbs excess recoil energy more effectively, resists spring fatigue, reduces spring "twang," and delivers a 15% stronger average return force. It's particularly beneficial for reliability with dirty rifles and steel-case ammunition.
Yes, Geissele Automatics manufactures this premium mil-spec buffer tube in the USA.
Geissele Automatics
Geissele Automatics
Geissele Automatics
