16 inch Hammer Forged barrelRifle, AR15, 5.56, 16" HF, M10, Mid LPGB Rif FSB, MOE BLK
That is how you can see what i bought on CMMG.com
Mid length gas system, the other options are carbine and rifle.
Low Profile Gas Block under the hand guard, with a Fixed Sight Block at rifle length position on the barrel.
BLK = black, not flat dark earth, camo, etc.
Has a Magpul MOE stock and handgrip.
Some low cost advice, never ask a forum if you made a good purchase AFTER you bought the firearm. Stick to questions about how to get more enjoyment out of your SUR, and have fun.