One Horse AR-15 A3 Stripped Upper Receiver

An A3 pattern stripped upper receiver for AR-15 builds. Stripped means you bring the small parts and the barrel yourself, which is the whole point when you are putting together something specific instead of buying a complete upper off the shelf.

It is machined from aluminum with an anodized finish and cut to mil spec dimensions, so it indexes with standard AR-15 barrel nuts, handguards and bolt carrier groups. Multi caliber, meaning the chambering comes down to whatever barrel you pair with it rather than anything about the receiver itself.