The Parker Mountain Machine Compensator is my Favorite Compensator
The Parker Mountain Machine single port compensator is in my opinion the best compensator that you can buy at the price point that PMM sells it at. At $100 MSRP, I got mine for $90 when PMM was running a sale, the compensator comes in a little cheaper than competitor products like the Agency Arms 417.
However, the PMM rocks. It has some major advantages over comeptitor compensators so lets dig right in. The PMM Compensator has a unique mounting system that I find is way more secure than any other compensator mounting system that I’ve used. PMM provides a shim kit to mount ot the barrel, just like you’d mount a muzzle device on your AR-15.
They give a generous amount of shims so that you can get the timing just right. Then they have you use rockset to set the barrel.
Installation of the PMM Comp was similar to an AR-15 Muzzle Device
Installation was easy and only took me maybe 5-10 minutes, but I’m used to working on AR-15s, so I felt right at home with this install. Another thing that PMM does well is they make compensators that fit very specific models of pistols.
Unfortunately they have discontinued the PSA dagger compensators, so I wasn’t able to get a PSA comp. I ended up buying a glock 19 gen 3 comp, which wasn’t the tightest fit at close glance. However, from the front and side the pistol still looks great, so if you own a dagger or after market glock slide, going with their glock compensator might not be a bad idea.
I did have one issue with fitment, as the compensator would catch on the stock PSA dagger frame, which must be a slight difference vs a glock OEM frame. To fix this, I simply dremeled a little bit of material off of the front of the dagger frame to accomodate the PMM comp.
So it wasn’t a perfect it on a PSA dagger, but that’s obviously not PMM’s fault. However, after installation I was off to the races and ready to take it to the range. I put about 100 rounds down range with the PMM comp, varying the ammo between a couple brands of 115 grain, 124 grain, and 147 grain ammunition. I didn’t have a single malfunction or failure with this compensator. That is more than I can say than with any other compensator I’ve ever tried, including more expensive options like the agency arms 417. Now granted, I have thousands of rounds through this PSA dagger.
PMM Compensator Range Performance
If you watch my channel, you know this gun is a guinea pig for testing new pistol accessories, so it gets a TON of usage. So the recoil spring is pretty broken in on this gun. If you install this on a new gun, you may or may not have the same luck, but I will say that running a similar setup with an agency arms comp, I had problems occasionally with malfunctions with different ammo types with agency arms. I didn’t have a single issue with the PMM comp. Moreover, performance with the PMM comp was excellent, better than any other compensator that I’ve tried.
The dagger with the PMM comp shoots extremely flat. I was so impressed. It was a night and day difference shooting the dagger with and without the PMM comp, and it’s range performance was so great. The PMM does throw up a lot pressure, so i did find that it obscured my sight picture. This would probably be a lot worse under NODs if that’s your thing, so something to keep in mind. It obviously varied between different ammo brands and powder loads, so I’d recommend playing around with different types of ammo if you’re considering running the PMM in a context where that is a concern. For my use cases, this doesn’t really matter.
The only drawback of the PMM Comp
There is only one disadvantage to the compensator, and that was primarily again, my fault because I used the wrong model on the wrong pistol. If you watch this parker mountain machine, please bring back the dagger compensators. I will buy one in a second.
However, because there is a gap between the glock 19 gen 3 comp and the slide, running this in a safariland ALS, the retention mechanism will catch the side of the comp, so I simply can’t run this in a safariland holster. Instead, I have to run this almost exclusively in a Blackhawk Omnivore. Not a big deal as I have a QLS system installed across all of my OWB holsters, but just something to consider if you go down this route and you’re a safariland guy.
Conclusion
So overall I love this compensator. It is by far my favorite comp, and it honestly seems like it is competition or duty ready right out of the box. I am extremely happy with this purchase, I left the range that day a very happy man. If you liked this video, please subscribe to the channel. We’ll have a new video next week, and I’ll be reviewing the agency arms 417 compensator soon. Have a great day!
