Kinetic sidelock mount for comp m4 - Kinetic Development Group SIDELOK Mount for the COMP M4 & Patrol Rifle Optics, Model

I really like Kinetic products. They are very well made,high quality. I purchased this one to mount an Aimpiont COMP M4s. There are 2 part's the mount and the mounting bracket. I didn't care for that too much I would have rather had a 1 piece mount. So the mounting bracket attaches to the Aimpiont with 2 screws. It's a solid attachment. The assembly then attaches with 4 tiny little screws,oh I forgot to mention these screws should be installed prior to attaching the mounting bracket because you won't be able to once the bracket is installed. There isn't enough room between the bracket and the Aimpiont. This is a little bit tedious if you are installing a COMP M4s because the battery is on the bottom of the Aimpiont. It comes with a 1/16 Allen wrench which has been made specially for this install. The short end of the wrench has been been shortend by half so that you can get it in between the Aimpiont and the battery. Then you can only turn the screw about a quarter turn at a time. It's tricky getting the wrench in the head of the screw it takes patience but it can be done. Be careful not to strip it. Once it was assembled I would say it seems very solid. It goes on the weapon easy. You just line it up where you want it on rail and roll it on. It makes an audible click when it's installed correctly. If it doesn't click it's not attached correctly. I had an issue with my BCM handguard/rail. There is a little piece that goes between the handguard and the upper receiver to keep it from rotating. I had to file a little tiny bit off the corner of the mount. Click, went right on. I talked to someone at Kinetic about the mount and I was told that as you fire the weapon the cam actually tightens the mount down. I have a few of these mounts I like to be able to switch between different optics. They always go back to zero and they are pretty tough. I haven't had any trouble with them