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80 Lower Drill Bits

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80 Lower Drill Bits

The 80 Lower Drill Bits that turn your 80% Lower into a finished, precision-milled AR 15 receiver are the critical components of any 80 Lower Jig. Using dull, over-worked 80 Lower Drill Bits will produce a sub-par, rough AR 15 receiver that hangs triggers, sticks magazines and fails to fire consistently. Even worse, the milling process can result in some nasty injuries thanks to broken bits and flying debris.

Generally speaking, a good AR 15 lower can be produced twice with one set of 80 Lower Drill Bits. We strongly recommend investing in an extra mill bit, just in case – after all, you’re turning raw aluminum with steel at high rates of speed. Pressure, heat and speed can always result in a broken bit and a halfway-finished Lower sitting in a Jig. You never want to remove your lower from the jig once you’ve started machining, so having extra 80 Lower Drill Bits on hand will prevent any issues with that.

You’ll find we sell quality, made-in-the-USA hardware. Our 80 Lower Drill Bits and end mill bits are solid carbide steel and feature 0.75” flutes for performance and precision. You’ll also find we carry 3/8” bits, 5/32” bits, 19/64” bits and 3/8” drill stop collars – that includes everything you need to begin machining and finishing your own 80 Lower.

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