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I bought this for a 9mm AR build I'm doing that is permanently suppressed. The fit and finsh are great and the install was easy. The price was right on point as well! Anyone with basic AR knowledge could install this in a few minutes. I would recommend this if you need a gas deflector for your 9mm build.
After fighting to get this to install on my 9mm at upper for 20 minutes, I realized that the small end on the Ejection port spring was too short. Luckily I a spare in my parts bin. The second one was fine.
Easy install, function is 100%, no complaints at all. Plus it looks great!
Great product, price and shipping was fast I was forced to order some forward assist plugs from another site since I didn't seem them on yalls page... and they didn't send me a tracking number etc. ordered the same day and they arrived 4 days after these products from 9mmar will be ordering a lot more from y'all in the future... keep up the great work
Thank you Jason from Texas
Kit installed with minimal fuss.
Looks good. Functions as designed.
Excellent value @ $20 shipped.
Fits Aero Precision M4E1 upper better than expected.
Has small amount of rotational play on the port door pin but this is mitigated by the tension spring.
Would likely be a tighter fit on a standard forged upper due to differences in contour above ejection port.
Overall very happy with it.
Works- after fighting with it for an hour. Not sure what the issue was maybe the tiny spring under the deflector, maybe the hole was drilled in the wrong spot, maybe the deflector itself was a little misshapen; either way it took a LOT of work to line up everything and get the rod in place.
This CMMG part is perfect in every way, except one: believe it or not, it needs directions. This port cover kit is basically identical to its full size "brother," but one needs a "third hand" of some type to hold the cover firmly against the upper receiver, so the big spring does not lose tension as one pushes the rod through the gas deflector. Once I figured out what to properly do, I used a hemostat to hold the cover tight as I finished the gas deflector install. Works quite well now...
Everything was good except for the deflector. The spring was broken off flush and the hole is too shallow for replacement spring I already had. I stuck a piece of rubber in it, and it works fine. Price was good so worth messing with.
A Plus for Best Price on a complete assembly. This is the second 9mm port cover kit I've ordered from these guys. Thanks for a Great Deal! On the first one installed I didn't have the trouble with to hole depth as other reviewer noted, have yet to install this one....