MSAR STG-556 TYPE OF FIREARM Bull Pup Rifle, Semi-Automatic, 7075 T6 Aircraft Machined Receiver OPERATION Gas Operated Rotating Bolt, Short Piston Drive, Adjustable Gas Piston CALIBER 5.56 mm (.223) BARREL GROUP 20(508 mm) 1-8 Twist Moly Chrome Lined Barrel, Removable Flash Suppressor, Quick Release, Quick Change Barrel OVERALL LENGTH 31 (784.4 mm) TRIGGER Pull Through Trigger System SIGHTS Integrated removable 1.5 x optical sight with back up iron sights STANDARD STOCK High Impact Resistant Synthetic Material in Black TYPE OF SAFETY Semi-Automatic 2 Position lateral push through and drop safety WEIGHT EMPTY 7.2 lbs. (3.26kg) MAGAZINE CAPACITY 10 Round OTHER FEATURES Hardened Stainless Steel Accessory Points, Picatinny Rail Options, Optional 1913 Side Rail System, Folding Front Tactical Hand Grip, Bottom Mag Release, Forward Assist New in the Box $1295.00 I am an FFL
MSAR | STG-556 RAT WORX USA i think you are wrong. ratworx, the leader in msar sales, also calls them the MSAR STG-556 E4 on there site. the msar official site has started calling it the STG-XM17 E-4 because of the different calibers offered. either way its still an STG.