M1A2 Conversion to Semi

Can anybody suggest the best way to convert an A2 carbine to an A1 semi Carbine

The M1A1 was never made in a full auto version by Inland. Any that were found were all conversions done by armorys and such. To change one back to an M1A1 is easy. Just replace all of the M2 parts with standard M1 parts. But if the receiver has been struck with a 2 over the 1 then it shall remain an M2 forever per ATF. If one of the major M2 parts is stamped with the registration number then the carbine can be returned to an M1A1. hth