The TopStop cover is designed to snap on most AR15 or M4 type upper receivers when they are detached from the lower receiver. The TopStop completely seals the upper receiver preventing fouling from getting in or out and it stops the bolt carrier group and charging handle from sliding out as the upper is moved around. The TopStop is made out of super tough polymer and is impervious to most solvents and chemicals. This product is perfect for storing or transporting your spare upper recievers, especially in low-profile bags where the rifle must be broken down to fit.
Posted by Kanan on 24th Nov 2016
Bought this as a fix to an issue I was having ! I run PWS piston uppers and had problems keeping the BCG contained in the upper, spring loaded BCG tend to run out of the upper when not connected to a lower, I bring more than 1 upper to the range. When transporting in a range bag my BCG would pop out and being greasy, would leave crud on my gear. This item completely keeps my upper secure and intact , BCG is kept where it's suppose to be. Plus, no more grease n crud anywhere. Didn't think I needed this , but now I can't think of a better way to transport my uppers.
Posted by Rudy on 17th Nov 2016
This is an absolute for any kit. Finally just what a shooter needs.
Posted by sean boyles on 27th Oct 2016
This thing is awesome. It keeps my spare uppers complete without have the BCG fall out. These are so good they should come standard from all the makers that sell complete uppers.
Posted by Timothy Frazier on 13th Oct 2016
THESE FIT NICELY AND DO THE JOB THEY NEED TO DO.
Posted by jason on 20th Sep 2016
This is an ingenious product. When the upper is off to place rifle in short storage like a BOB you don't need to worry about that BCG falling out. It comes off quick when you are ready and not before. Very cost effective as well..
Posted by Brian on 1st Sep 2016
Fit is very tight as should be when new. Does exactly what it is meant to do.
Posted by Unknown on 29th Aug 2016
Had issues with bolts slipping out and charging handles following. With this installed I can carry multiple uppers to the range and not worry about loosing pieces. They are a little hard to get on and off at first but once broken in they work great.
Posted by Michael Carr on 14th Aug 2016
I ordered this, having ordered Raven's Vanguard 2 holster for my M&P (wish they'd bring that back into production). I was very impressed by the holster, and I remembered seeing this product when I bought it. I just built an AR Pistol with two different uppers, and I remembered this product when I finished the second upper. I figured I would do some research and see if others had reviewed it. But then I saw it was $10! The shipping was more than half the price of the product! For $16, I figured I would just try it out blind since I had enjoyed their other product. It snaps in perfectly, and protects the bolt carrier group and the lugs that lock the upper onto the lower. Great Product! Will buy more for any more free uppers I build.
Posted by Marc on 8th Jul 2016
Didn't know such a thing existed, but was recommended by a friend. Excellent precision fit to protect the upper's exposure. Great value for the price.
Posted by Curtiss on 26th May 2016
I switched to the smaller pelican 1600 case from the 1750 and have to breakdown my AR so it will fit. After going to the range one time I saw the need for this upper cover. I don't have to worry about my bcg and charging handle sliding out until I'm ready to slap the upper and lower together.