9Mm Complete Bolt Black Semi Auto Only

Building a 9mm AR-15 pistol-caliber carbine? The Stern Defense 9mm Complete Bolt is purpose-built for shooters who want a reliable, semi-auto-only bolt carrier that runs in standard AR-15 uppers. Whether you're feeding Glock or Colt magazines, this bolt is machined from 8620 AISI steel and treated with a hardened Melonite finish—the kind of tough-as-nails construction you need when you're running thousands of 9mm rounds downrange.

What makes this bolt worth your money is that it arrives completely assembled. No hunting for pins, springs, or wondering if you've got the right parts—just drop it in your upper and go. It works with all standard upper receivers and Glock-pattern uppers alike, and it's compatible with your existing charging handle. If you're mixing and matching AR-15 components or standardizing your PCC setup around Glock mags (one of the most practical choices out there), this bolt takes the guesswork out of compatibility.

One key detail: this is a semi-auto-only design. It's not rated for or compatible with full-auto fire-control groups, so make sure your build matches your local laws and intended use.

Key Features

• Completely assembled and ready to install—includes all necessary pins and springs
• 8620 AISI steel construction with hardened Melonite finish for durability and corrosion resistance
• Compatible with both Glock and Colt magazine patterns
• Works in all standard AR-15 and Glock-pattern upper receivers
• Functions with standard charging handles
• Semi-auto-only design—not compatible with full-auto fire-control groups

Specifications

Frequently Asked Questions

Will this bolt work with my Glock magazine-fed 9mm AR-15?

Yes. The Stern Defense 9mm bolt is designed for both Glock and Colt magazine patterns, so it'll run either way. If your upper is set up for Glock mags, you're good to go.

What uppers are compatible with this bolt?

This bolt works in all standard AR-15 upper receivers and Glock-pattern upper receivers, and it's compatible with standard charging handles.

Does it come fully assembled?

Yes. The bolt arrives completely assembled with all necessary pins and springs installed, so there's no additional assembly required.

Can I use this in a full-auto build?

No. This is a semi-auto-only bolt and is not compatible with full-automatic fire-control groups.