SIG Sauer (Swiss Arms / SAN)

The SIG SG 552 Commando is a compact assault rifle manufactured by SIG Sauer in Switzerland. It is a shortened variant of the SG 550 series and was introduced in 1998. The SG 552 features a 226 mm barrel, a telescoping folding stock, and a full-length Picatinny rail on top of the receiver. It is chambered in 5.56x45mm NATO and feeds from standard SIG 30-round magazines. The Commando is designed for close quarters battle, special forces, and vehicle crew use.

The SIG SG 551 is a carbine-length assault rifle manufactured by SIG Sauer in Switzerland. It is a shorter variant of the SG 550 with a 363 mm barrel and a redesigned handguard. The SG 551 was developed for military and law enforcement users who need a compact but accurate rifle. It retains the diopter sight system, folding stock, and 30-round magazine of the full-sized SG 550. The 551 is chambered in 5.56x45mm NATO.