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The basic Foundation of any quality AR Build bundled together at a Great Price! This Kit includes a Anderson Manufacturing A3 Upper Receiver, Lower Receiver and AIM Bolt Carrier Group. The receivers are machined from 7075-T6 Forgings to Mil-spec dimensions. The kit features the heart of the kit with one or our MPI, USGI spec. Bolt Carrier Groups. Please Note: Upper receivers do NOT have T-markings on the rails from AIM Surplus (Product F1ARBK)

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