Advantages of HDPS CORP. Barrels

Those are the HDPS CORP production UMP and USC Barrels made with the cutting edge CNC machinery by Green Mountain Rifle Barrels Co., a company in the specialty business of only make quality barrels for many years…

Those barrels are made from blanks of 4140 Chrome Molly Steel, turned on centers, machine finish. Stress relieved & Air gaged to +/- 0.001″ ~ 0002″.

You can find reproduction barrels for the UMP and USC in two places only, BUT you will find the exact specs of the originals German made only here. Just compare the UMP barrel. Our barrel is an exact reproduction with all German specs. not a low profile barrel.

Also, our USC barrels have the same design of the UMP barrel by the chamber face allowing :

1- The use of a 16″ barrel in the UMP, so PD’s and Govt. Agencies that always wanted a little more speed and accuracy on their UMP’s, now have a choice for a quick barrel swap.

2- All barrels are compatible with USC bolt/carrier AND UMP bolt/carrier!!

Make no mistake, we are the only ones offering those barrels in the very same HK German specifications, just compare the UMP barrel profiles.

IMPORTANT NOTES

Be aware of after market brands offering a “magical” special refinish on those barrels, is no such thing, those barrels must be between +/- 0,001″~0,002″ and in order to apply such special finishes their barrels in order to work must be under the specifications to make up for the thickness of their finish, once finish wear out you also have an out of specs barrel flange.

UMP and USC HDPS Barrels      

Those are the HDPS CORP production UMP and USC Barrels made with the cutting edge CNC machinery that will be available for sale in a few weeks. I got some samples for test fire and they work 100%.

You can find reproduction barrels for the UMP and USC in two places only, BUT you will find the exact specs of the originals German made only here. Just compare the UMP barrel. Our barrel is an exact reproduction with all German specs. not a low profile barrel.

Also, our USC barrels have the same design of the UMP barrel by the chamber face allowing:

1- The use of a 16″ barrel in the UMP, so PD’s and Govt. Agencies that always wanted a little more speed and accuracy on their UMP’s, now have a choice for a quick barrel swap.

2- Will accommodate the enhanced USC bolt for those that want to be able to load your converted Carbine in silent mode.

Important – Third Version of Barrel “USMP”

This is the special USC 16″ barrels made WITH the UMP quick attachment tip on them, so you guys will be able to attach the UMP flash suppressor or a sound suppressor.

Barrels are dark Gray in color like the Original German barrels (if you want in black, just ask)

Buyer be aware…B&T products for the UMP (flash suppressor and folding stocks) are not uniform in specifications, parts vary greatly….some flash suppressors work just fine and some others require some work and fitting.

I have tested 5 of those suppressors in an OEM German UMP barrel, 3 fail to slide in and lock without requiring fitting.

We have plans to offer our HDPS Phanton Flash Suppressor soon! It will cost way less.

Barrel Work for AR-15/M16’s
Change Profile – POR
Thread Barrel – POR
Weld long flash suppressor – POR
Any Custom work – POR

BARREL ACCURACY TEST

UMP HDPS barrel test fire at 25 yards, fired 7 rounds only so would not destroy the target and you can see the hits…and I did not really put much effort, stand up position, no sling.