You'll have a fight on your hands installing the barrel nut as the threads on the nut that connect to the tube are female. Therefore, you can't use a armorer's wrench to properly torque and index the barrel nut. Get a pretty good quality strap wrench (I picked up a set at Lowe's for 15-20 bucks) and get after it! If you do not have a block to hold your upper in a vice, have a gunsmith install the barrel nut or you'll never get it tight enough. Once installed, it's a great product!! The overmolded grip and tube offer great traction and are very comfortable. This combo in mid-length is very difficult to find but a great price here at optics planet.
Pros: Great product, comfortable, excellent value
Cons: Tough to install
This review was written in the old system and had content requirements that are different than reviews written today.