Hello,Is the bolt carrier with the SIG 516 Gen 2 10" upper Full aotu or Semi auto profile?
Referenced product: UA516G2-10
Sig's 516 uppers have a semi-auto only bolt carrier group unless the part number contains MGA. The referenced product is a semi-auto only BCG. The UA516G2-10MGA ships with a full auto capable bolt carrier group. The lower receiver must be a full auto receiver for the firearm to function as a full auto with the UA516G2-10MGA.