"I think the CQB (552 Type) is a discontinued design so parts may be in short supply. SAN is only producing the 553 type now. "
Wrong, most reputable companys produce parts for at least 10 years following the discontinuation of a gun. In this case they are still producing parts, have them in stock and you can buy the SG553 gas system parts to retro-fit the SG552 / CQB and make it into a SG553. You only need 4 different parts and one is a standard SG550 bolt carrier.
Rich
Wrong, most reputable companys produce parts for at least 10 years following the discontinuation of a gun. In this case they are still producing parts, have them in stock and you can buy the SG553 gas system parts to retro-fit the SG552 / CQB and make it into a SG553. You only need 4 different parts and one is a standard SG550 bolt carrier.
Rich


















































