First Responder/MIL/Veteran Discount


BLEM PMM Barrel and Ultra Compensator Combo for Glock

Original price was: $355.00.Current price is: $320.00.

Would You Like An Extra Shim Kit?

Yes (No Loctite 272)

PMM JTTC "Muschi" Mounting Block

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Order total:

Earn up to 320 Points.

Product Details



These are fully functional. They are discounted and marked as BLEM for a variety of cosmetic reasons including tool marks, imperfections in the coating, minor scratches, engraving blemishes, etc. Comps may be old style with pockets, or newer smooth sided.


No returns.


The PMM ULTRA JTTC for the Glock 17/19 utilizes a dual port design at the vertical position, which maximizes the effectiveness of the compensator in keeping the muzzle of the pistol down and allows the slide to “track” faster , getting you back on target quicker. Our JTTC’s work by redirecting the gases expelled from the round, therefore sending less energy back into the slide which in turn decreases muzzle rise. Our ULTRA line of compensators offers the absolute best performance that we can achieve with most factory loaded 115 grain ammunition, all while maintaining reliability.

The ULTRA JTTC and Barrel for the Glock decreases muzzle rise by 50-55% with factory loaded 115 grain ammunition.

All of our compensators are tested in a ransom rest and measured with a digital inclinometer.

We have adapted our designs to integrate with and complement the design of your pistol so no longer does a compensator have to look like an afterthought slapped on the end of your pistol, rather it delivers unmatched performance and looks.

These dual port compensators are the same size as our single port and will work in holsters designed to accommodate the original JTTC! See holster information below.

**Please Note: Only the g19 gen 5 & g17 gen 5 ultra combos have the machined logo. Other variations to follow.


1 x Gen Glock ULTRA Compensator

  • 7075 Aluminum finished in a type 3 class 2 Black hardcoat anodize.
  • No set screws, mounts like a muzzle device on a rifle.
  • Captured springbox design ensures that even if your comp comes loose it will not come off or impede function

1 x PMM Glock ULTRA Barrel in Black DLC
1 x Shim Kit

  • 4 x 0.010″ Shim
    2 x 0.005″ Shim
    1 x 0.002″ Shim
    1 x 0.05mL Vial Loctite 272


9mm Ammo known to work well with our dual port comps.


Federal American Eagle
Speer Lawman
Remington UMC
Sig Sauer

Speer Lawman
Federal American Eagle
Sig Sauer
Remington UMC

Most 147gr ammo will run but you will see less performance due to a lack of velocity


Sizing & Holster Fitment

19 with Standard JTTC/ULTRA JTTC Mounted – Longer than G17, shorter than G34

17 with Standard JTTC/ULTRA JTTC Mounted – Same length as G34 & Flush with X300U

Passive Retention (Level 1) Kydex Holsters:

PMM Recommendation-

Cascadia Concealment 


Tier 1

You will need a G34 length or open ended holster for both options.

Active Retention (Level 2 & 3) Duty Holsters (Namely Safariland):

PMM Recommendation- RDR Gear

You will need a G34 length holster. Additional, the holster plug will likely require modification/removal for proper lockup and function.


G19 w/Single port JTTC or Dual Port JTTC = In between length and a G34 holster is required.
G19 w/Micro comp combo is the exact lengh of a G17 so a G17 holster is required.
G17 w/Single port or Dual Port JTTC = G34 length and a G34 holster is required.
G43/G43x with micro comp is a the length of a G48 so a G48 holster is required.
G48 with micro comp is G17 length.

P320 subcompact with ULTRA = Length of full size P320 so F/S P320 holster required.
P320 compact with ULTRA = Right around X5 length so a X5 holster is required.
P320 compact with GEN 2 = Lenght of full size P320 so F/S P320 holster required.
P320 subcompact with MICRO= about 1/4″ longer than a compact P320
P320 compact with Micro you will need a Full Size P320 holster
P365 with Micro comp= P365XL length and a P365XL holster is required.
P365XL with Micro- Comp adds 1/2″ in length.

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.


Note: Threaded pistol barrels are not legal in all areas. It is your responsibility to check your local laws before ordering a threaded barrel.  You also understand and agree that all firearms and firearms related activities are potentially dangerous if handled/conducted improperly and can pose risks and hazards to yourself and others, which may result in property damage, serious injury or death.



DISCLAIMER: This product is not manufactured, authorized, endorsed,
or warranted by GLOCK. GLOCK does not warrant or represent that this
product is compatible with GLOCK pistols.

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


Additional information


Gen 5, Gen 4, Gen 3

Compensator Finish

Black, FDE


Glock 19, Glock 17

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