This SIG hicap from ICS fits the ICS SG551 and SG552 airsoft AEGs. It will not fit the G&G SG models, but will fit other SIG AEG rifles. The tabs allow the SIG magazines to be clipped together for easy carry.
370 round capacity keeps your SIG AEG in the fight longer. The translucent construction allows you to easily check how much ammo you have left.