Small price, big satisfaction - AIM Sports Inc AR/M4 MLOK Handguard

I've purchased and installed 3 of the 15" length hand guards. They work great. The barrel nut is shipped inside the guard with the install tool and bolts. Installation was easy and the fit it great. Not needing to time the barrel nut is a plus. The bolts pass right thru grooves in the barrel.nut and are secured by square nuts in the recess of the other side of guard. I did have threads strip in one of the square nuts, but for a few pennies I found one at the local hardware store. No big deal. They look great and don't weigh a ton.