Additional information
| Color | Black, FDE |
|---|---|
| Generation | Gen 1-3, Gen 4, Gen 5, 19x MOS |
$100.00
1 x PMM Compensator for Glock
1 x Shim Kit
Optional Muschi Mounting Block
Glock 45, 19x, 26 (all gens), 47, and 49 require a gen 5 comp.
Glock 34 gen 4 & 5 require a gen 5 comp. We do not recommend our comp for the Glock 34 gen 3.
We cannot guarantee fitment on the Glock factory threaded barrel. We advise against using our duty comp for these barrels.
These comps are designed to fit factory slides. If you are purchasing this for an aftermarket slide, please contact customerservice@parkermountainmachine.com to confirm which gen comp you will need.
PMM 1/2 x 28 threaded barrels for Glock can be found here, or save by buying a barrel and comp together.
Gap will vary depending on your barrel. We cannot guarantee fitment on the Glock factory threaded barrel. We advise against using our duty comp for these barrels.
See the attached print for reference. And watch the video above.

All of our compensators are tested in a ransom rest and measured with a digital inclinometer.
The PMM duty comp for the Glock was designed to work with most factory loaded ammunition and yield 30-35% reduction in muzzle climb (with 115gr UMC)
Active Retention (Level 2 & 3) Duty Holsters (Namely Safariland):
PMM Recommendation- RDR Gear
GLOCK:
G19 w/ duty comp = In between length of a G17 & G34 so a G34 holster is required.
G17 w/duty comp = G34 length and a G34 holster is required.
PMM suggests using high quality holster manufacturers and not ones who skimp on material and care more about marketing.. We have great success with T-Rex Arms and Tier 1 Concealment.
T-Rex Arms also has a “threaded barrel” option on its holster builders and this option will cover our Micro comps perfectly.
115gr:
Federal American Eagle
Speer Lawman
Wolf
Remington UMC
Sig Sauer
Fiocchi
Magtech
124gr:
Blazer
Speer Lawman
Federal American Eagle
Sig Sauer
Winchester
PMC
Remington UMC
147gr:
Most ammo will run, but you will see less performance due to a lack of velocity
Ammo to stay away from:
Blazer 115
Winchester White Box 115
Armscor 115
PMC 115
All reloads or reman ammo
PMM reserves the right to make esthetical design changes. While we try to accurately represent our current product offerings’ designs, there may be some esthetical variation from the product posted on this page and the product you receive.
DISCLAIMER: “GLOCK” is a federally registered trademark of
GLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. and
GLOCK Ges.m.b.H. Neither Parker Mountain Machine & Armory nor
this site are affiliated in any manner with, or otherwise endorsed by,
GLOCK, Inc. or GLOCK Ges.m.b.H. The use of “GLOCK” on this page
is merely to advertise the sale of GLOCK pistols, parts, or components.
For additional genuine GLOCK, Inc. and GLOCK Ges.m.b.H products
and parts visit www.glock.com.
| Color | Black, FDE |
|---|---|
| Generation | Gen 1-3, Gen 4, Gen 5, 19x MOS |





William R. –
Absolutely love the comp. machine work was top notch. Item arrived very fast. I do wish it had a little extra thread depth so it didn’t have a gap.(which is completely my fault) if I had it to do over again I’d buy the comp and barrel package.
eescobar79 (verified owner) –
Put this on my Shadow Systems MR920 and it works fantastic. I shot 124gr reman and 115gr new with no issues. You can feel a huge difference between the compensated vs not. I would highly recommend buying one of these.
Austin Richardson (verified owner) –
I put one of the single port PMM comp on my Gen 5 Glock 19 and it worked flawlessly. I did not have a single jam or failure to load another round into the chamber. I’m still running the stock recoil spring as well. I would highly recommend this Compensator to anyone.
griff –
Fits nice looks clean.
Shems are a bit of a pain but once you get the right mix they work great.
Only thin i would add is a small spring loaded detent and set screw in bottom to remove the need for loctite.
Overall very happy with it made my g34 look mean.
Kyle S (verified owner) –
I have been wanting this comp for a while, and finally purchased it. I’m super happy with it, it definitely helps reduce muzzle flip and looks beautiful! It works with and fits perfectly on my Griffin Armament threaded barrel.