What is 80 percent auto sear. YES This jig works with our C-4, C-9, C-45, C-5, and G-15 80 Lowers and all other 80 lowers on the market The New Frontier Armory Complete 80 Jig Kit is all you need to complete the final machining process to turn your 80 AR-15 Receiver into a working stripped lower receiver.
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