Ergo grip comes with allen screw, washer need a key - Ergo Grip AR15/M16 Ambidextrous Tactical Deluxe Rifle Grips

Luckily its the sane key as many other things like ace skeleton stocks so i happen to have this long key. At first i hated it. It was so different then my moe plus. Its like a hogue but swelled out so much. But after holding it you get used to it your hands are a glive size large or xl. 10.5inch hand the middle is surprisingly thick. I did order a daniel defense to Match with the stock its going to be hard to decide which i want. The angle could be a bit mire strait like bcm and strike is doing however because of the shape it makes your wrist bend a bit like the MOE but not as much due to the angles you can grip this. Only buy if you have a decent size hand if you were ever told u have short fingers or palm dont bother go eith the bcm or Hogue or fab if you want finger grooves if you want something without it the reptilla bcm cant go wrong even the wilson combat. Give it a few days its weird at first.