You love to build guns. You’ve heard about building an AR from scratch using little more than a drill press. This is the toolkit to get it done: The Broken Arms 80% Jig is designed to eliminate the need for any sort of expensive equipment like a router or mill. It uses unique templates that allow you to fabricate any AR-15's forged or billet 80% lower or any AR9 80% receiver with nothing more than a drill press and vise.
How the Broken Arms Jig Works
Rather than side-load your tooling like a router or mill requires, the Broken Arms Jig takes a vertical approach to cutting the receiver for the lower parts kit. Using the drill bits, you’ll complete the entire rear shelf and main fire control cavity for the hammer, trigger, and safety. The jig tells you how far to drill; all you need to do is control the press. You’ll use the end mill bits only for trimming up the receiver’s walls and cutting a slot for the trigger.
It’s All in The Bits
The secret to the Broken Arms Jig isn’t just the templates and guides. The included bits are made from quality high-speed steel (HSS). These are commercial-grade bits that can eat through forged aluminum in seconds, making fabricating multiple receivers as quick as it is simple.
- (2) Side plates with drill bushings
- (5) Template plates for fabrication
- (4) ¼-20 x ¾” jig fasteners
- (2) ¼-20 x 2 jig fasteners
- (1) Instruction manual
- (1) Set of drill bits
- (1) Set of end mill bits
- Drill Press
- Drilling Vise
- Machining Oil
- Eye Protection
- Ear Protection
With your receiver fabricated, you can install a lower parts kit and buttstock or brace, throw on an upper receiver of your choice, and hit the range in one day.
Shipping of various parts and/or accessories are prohibited to states and locales (ie New Jersey, California, New York, etc…) with restrictions against certain parts and/or accessories or “assault weapons” (i.e. states with high-capacity magazine restrictions, manufacturing of semi-automatic weapons, etc..). It is your responsibility to be aware of your local firearms laws before purchasing from our website or machining a firearm. We try our best to keep our shipping page current, but laws change daily
80-Lower.com only ships within the United States. Federal legislation dictates we cannot ship our products internationally.