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The Sig SG 550 STGW 90 military and instructor issue rifle explained
The Swiss designation STGW 90, is the non-export version of the SIG SG 550 issued to military personal and instructors of the Swiss Confederation. It was produced in Switzerland by SIG Combibloc Services AG. The STGW 90 is the replacement to the STGW 57, its philosophy is rather different than its predecessor. While the STGW…