We love America's favorite handgun, so we've stocked a full line of 1911 frames and build kits from Stealth Arms. These new forged (7075-T6) aluminum frames are rugged as Hell and they're 60% lighter than the original steel frame, providing better balance and comfort when carried or while shooting. They're available chambered in 9mm or .45 ACP, with or without a Picatinny rail, with configurations available for the full-size Government (5") and compact Commander (4.25") platforms. Grab one in anodized black for a sleek matte finish, or stick with a raw (bead-blasted) frame and customize it.
The 80% Frame: Not a Firearm
These 1911 frames are “80 percent complete”. By definition, that simply means that the frames on 80-Lower.com are not fully fabricated and are not functional. They require some cutting and drilling to be performed by you, the builder. The Bureau of Alcohol, Tobacco, and Firearms (ATF) officially defines the 80% 1911 frame as a receiver blank. The ATF confirms firearm and receiver blanks are 100% legal to buy, ship, own, and build.
Machining the 80% frame transforms it into a firearm by law. To complete the frame, the following steps are required:
- Cut the slide rails
- Cut the barrel seat
- Drill the hammer pin hole
- Drill the sear pin hole
All other machining steps have been completed for final assembly.
"How Do I Finish my 1911 Frame?"
Completing the four steps above is relatively simple and requires a gunsmithing tool called an 80% jig. The Stealth Arms 1911 Jig is compatible with all 80% 1911 frames we sell. The jig includes the necessary drill bits to drill the hammer and sear pin holes, while an included hand planer, or "cutting car", is provided with blades installed for completing the slide rails and barrel seat. Total machining time for first-time builders is usually two hours or less.
Read Our Guide: How to Build Your Own 1911 At Home. This guide includes the instructions for setting up the jig and completing the frame, start to finish. No experience is required. All you need to get the job done is a basic hand drill (or drill press) and a tabletop vise.
Completing Your Build: 1911 Parts & Compatibility
With your 80% frame cut and drilled, all that's left is to install a 1911 parts kit with a slide and barrel! Once finished, your frame will be 100% compatible with all retail 1911 parts. We recommend checking out the complete 1911 build kits. They include the appropriate 80% frame and they ship with handpicked, quality parts so you can complete your build in a single day: Novak sights, crisp triggers, hyper-accurate stainless barrels, and serrated Parkerized slides.
DISCLAIMER: If you are new to the world of DIY gun building, you likely have a lot of questions and rightfully so. It’s an area that has a lot of questions that, without the correct answers, could have some serious implications. At 80-lower.com, we are by no means providing this content on our website to serve as legal advice or legal counsel. We encourage each and every builder to perform their own research around their respective State laws as well as educating themselves on the Federal laws. When performing your own research, please be sure that you are getting your information from a reliable source.