F.S.U.O. (For Set-Up Use Only)
These 80% lowers are specifically engraved F.S.U.O. (For Set-Up Use Only) as they are functionally, or cosmetically out of spec to our requirements. The non conformances vary from receiver to receiver and there will also be lowers that are missing operations like the broaching of the magwell and the drilling of the bolt catch hole. With these lowers, there will be something that is keeping them from being within specifications, but with further advanced setup, these lowers can function. We machined this 80% to be a practice part, this part is not intended for use other than to practice or setup receivers.
**F.S.U.O. is engraved on both sides of the grip area to tell to distinguish between our other 80% products.
***This item is a non returnable item.