Battlefield Hardline SG553
The SG553 is an improved version of the SG 552 and was released in 2008. Even though it mostly resembles the SG552, the SG553 has one key advantage, the recoil spring is now wrapped around the piston rod as in the SG 550/551 models, which address several reliability issues encountered in the SG552 and also allows the usage of the standard SG 550/551 charging handle.
The SG553 series rifles have a 339 mm (13.3 in) long sight radius.