||first off, out of the box, this rail system looks and feels great. It has a nice sold build out of aluminum. It maybe a tight squeeze off the initial installation but it does fit! It comes with a metal pin to hold rail system in place and comes with two bolts to lock it in place. It gives the ACR a whole new intimidation factor and making the 14.5" barrel look longer due to a shorter handguard profile.
As much as this rail system looks great, i had many issues with it. If you were using a 9.6v nunchuck battery, it does not fit in this rail system. i suggest a 7.4v small type lipo. Its a hassle to take off the rail system to charge your battery due to the two bolts given to lock it in place, although due to the tight squeeze of the rail system already, i suggest not putting them on and just keep the metal pin inside. lastly, it adds about 2 pounds to the front of the gun and makes it very front-heavy, so aiming for long periods at a time can leave the user fatigue since theres no weight at the stock of the ACR.
Pros- Looks Great
-Very Nice Build Material
Con- 9.6v Nunchuck does not fit
-hassel to put on and off
-makes the gun front heavy
Rating: [3 of 5 Stars!]