TACTICAL PRECISION, For 2011, SIG SAUER® is offering several variants to its tactical platforms. NEW to this lineup is our new SIG551-A1, chambered for the widely used 5.56 x 45mm NATO caliber using Swiss Polymer magazines. The SIG551-A1 features a distinctive swiss folding stock, and an M1913 rail for accessory attachment. The 16” barrel features four-groove rifling and a twist rate of 1:7”. The SIG551-A1 measures 36.1” but can fold to 26”, making it ideal for situations where maximum maneuverability is required. For Special Forces requiring an accurate, more potent rifle, chambered in 5.56 x 45mm NATO, the SIG551-A1 sets a new standard for dependable operation and function.
Item Number R551A1-F16B-C
Caliber 5.56X45mm NATO
Overall Length 36.1”
length w/Stock Collapsed 34.6”
length w/Stock Folded 26.0”
Barrel Length 16”
Rifling 1 in 7 in
Sight Radius 18.0”
Forearm Polymer
Stock Type Swiss Type
Weight w/out Mag 7.0 lbs
Operating System Gas piston, rotating bolt
Mag Capacity 20/30 rounds
Features Swiss type folding stock, rotary diopter sighting system
MSRP $1,599.00
CA Compliant No
MA Compliant No