SIG SAUER, Inc. combines the ingenuity of SIG SAUER GmbH in Germany and Swiss Arms AG in Switzerland. Long known for producing superior firearms, SIG SAUER has announced that it will begin production of the SIG SAUER 551-A1 as the civilian version of the SG 551 that is currently being used by the Swiss Army.
The SIG551-A1 is a semi-auto version of the SG 551 that is American-built. The rifle uses an adjustable gas piston to operate a rotating bolt. The 2-point gas piston system allows for a cleaner, cooler shooting rifle, and promises long service life with reliable operation.