This is the best jig in my opinion to cut rails in 1911 80% frames. All Matrix Precision jigs actually are extremely useful to anyone without any decent machines.
This jig allows the user to cut the slide rails on an 80% frame with ease and precision. And if powered by elbow grease (crank handle) vs. a power drill they are very quiet, so if your loved ones or neighbors are asleep you can quietly "relax" and cut some rails in your frames.
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