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Milled to military specifications, the Knight's Armament SR-15 Stripped Lower Receiver is a ready-made foundation for any AR build, since it's designed to accept all standard mil-spec lower parts kits. The lower is machined from battle-proven 7075-T6 aluminum and is treated with a Type 3 hard-anodized finish.
Posted by Paul V on Apr 18th 2020
Clean machining,finishing, ease of assembly. KAC SR-15 is the lower that truly deserves only the best quality of parts in it's buildup. Save the cheap garbage for the poverty ponies!
PS: The lower receiver is going to be the cheapest part of this project.