HOMELAND DEFENSE AND POLICE SUPPLY CORP.

Several brand names are cited on this site like COLT, SIG, H&K, UZI, FN, those are registered trademarks of those brand names, and are used here as a reference to the genuine COLT, SIG, H&K, UZI, FN parts that HDPS CORP sells, or because HDPS CORP offer services on COLT, SIG, H&K, UZI, FN weapons. Is to be clear that HDPS CORP is not affiliated with COLT, SIG, H&K, UZI, FN in any other way.

All conversions Title 1 (transfer like any other firearm) or registered SBR's (NFA) done by HDPS CORP. comply 100% with BATFE regulations regarding imported parts count in an Imported Assault Rifle 18-U.S.C. section 922(r). and also rendered impossible to modify for illegal full auto.

Please if you are just purchasing parts, make sure to have your conversion done in compliance. Compliance parts for Title 1 conversions and SBR's are available to choose the needed 3 parts.

Warning, failure to comply will render your conversion illegal living you at mercy of $250,000.00 fine and up to 10 years in Fed Jail charges. Please be safe, be compliant !

Also note that another brand of conversion that uses a lower receiver/pistol grip as one piece, original USC lower and long stick 20 rds magazine, all their parts ARE NOT made in U.S. and none of them count as compliance parts! Don't make an illegal mistake!

The first left one is the SBR UMP clone, the two on the right are the real UMP's

Stock Block "B" - $195.00 for finished USC to UMP stock block and screws. All new Block B's will have the long cross block steel screws with eyelet/flat thumb ends ready, the screws are parkerized and Teflon Molly coated in black

Realistic looks of the real Sound Suppressor available for the Hk UMP's, integral one piece milled from a solid Aircraft Aluminum Grade cylinder, no parts to get loose, slip over 16" barrel, comes with all hardware needed to fasten the FSS to the receiver NOT to the barrel like other brands, DON'T scratch/ruin your USC barrel with others fake cans using pressure fit or screws directly to the barrel.

-Note- for those that do not have the lower UMP vent milled, the kit will come with a self adhesive template showing where to drill the two holes for the screws.

The engraving will be in black, unless you specify you want it in white, you can also fill up the engraving with any other color yourself if you like.

$125 (IN STOCK) (This is a FAKE Sound Suppressor, not NFA or require any registration)

HDPS Push Button Hinges / HDPS skeleton stock all mounted and ready to install (compliance part) (In stock)

The HDPS stock and hinges can be purchased with Block "C" or you can purchase the Block only and install the folding stock yourself. It can be made to fold to the Left or Right. Advantage in this set up is ZERO flex unlike the UMP polymer stock, positive locking open or closed, no rattle....an excellent feel for those that actually want be able to fire the weapon with comfort and precision and not only looks.

HDPS Push Button Hinges / AR/M16 adaptor/ 6 position M4 reinforced (show in photo w/ battery compartment that's no longer available) (In stock)

For comparative purposes, this was HK solution using the M16 collapsible stock, they made the stock to fold to the right side in a sharp angle to clear the ejection port, but close the access for the trigger....

If you already have your USC, you can ship it to us for the conversion and here is the break down in prices, you choose what you want for parts or services, turn around is 3~4 days for full conversion but you must e-mail to get in the schedule.

( * ) (ALL HK PARTS ARE GENUINE AND FACTORY NEW, NOT USED FROM PD's in brown paper, price changes reflected from distributor prices

$ 205- HK UMP Folding stock (IN STOCK) (ATTENTION B&T brand will not work as it was not built for the UMP but for the MP5 receiver adaptor)

$ 195- STOCK BLOCK "B"- Come with long cross eyelet/thumb flat screws in black already!! (IN STOCK AGAIN !!)

$ 165- STOCK BLOCK "C" with Steel eyelet/thumb flat screws (IN STOCK) NEW ITEM!

$ 305- STOCK BLOCK "C" / HDPS ""PUSH BUTTON"" Hinges / HDPS stock all mounted and ready to install (compliance part) (in stock)

$ 325- STOCK BLOCK "C" M16 HDPS ""PUSH BUTTON"" Hinges / AR/M16 adaptor/ 6 position M4 reinforced stock ready to install, (compliance part) (IN STOCK)

$ HK UMP 4 position lower (out of stock)

$ 399 HK UMP NAVY lower (IN STOCK)
$ 395 HK UMP FBI lower (IN STOCK)

$ 135 Made in USA UMP/USC trigger (compliance part) (IN STOCK)

$ 11 Made in USA UMP mag floor plate (compliance part) (IN STOCK)
$ 22 Made in USA UMP mag follower (compliance part) (IN STOCK) ((CNC from a T7 aluminum billet, NOT A HOMEMADE PLASTIC PART FROM ELSEWHERE))

$ 210 USA made by HDPS USMP barrel 16"(compliance part)- (IN STOCK)
$ 200 USA made by HDPS USC barrel 16"(compliance part)- (IN STOCK)
$ 215 USA made by HDPS UMP barrel 7.87" in Stainless Steel in black only (compliance part)- (IN STOCK)

$ 395 Hk NEW German USC barrel on 7.87" threaded 16X1 RH or LH (IN STOCK)

$ 25 USA made by HDPS Steel eyelet and thumb flat screw (pair) for standard USC and first generation Block B (IN STOCK)

$ 48 USA made by HDPS LONG Steel eyelet and thumb flat screw for Block B (pair) (IN STOCK)

$  40 Upper rail (IN STOCK)
$  30 Front rail/each (IN STOCK)
$ 19 Vertical Grip (IN STOCK)
$  75 New UMP mag (IN STOCK)

$125 HDPS Faux Sound Suppressor (IN STOCK)

LABOR LIST

$ 35 labor to turn UMP lower to work together with USC upper --( using Stock Block B)
$ 30 Labor to invert white mark at USC selector if using NAVY lower
$ 15 Replace internals
$ 45 Engrave Polymer receiver for SBR

$ 18 Mill upper receiver to accept the UMP Mag
$ 75 Mill Rt. and Lt. UMP and lower vents in front receiver
$ 50 Dye Job on Upper Receiver only (Industrial Dye)

$ 25 Labor to completely close with polymer the Release Lever Catch front section in the UMP lower, pin is modified to prevent slide out and top of the fill is milled out ( this service prevent the lower to be used in full auto function by replacing the disconnector, most call it wrongly as Auto Sear). This also helps to secure and create a strong base for the front slim plastic wall that hold the strong hammer springs.

(click on thumbnail pics for bigger photo of this service).

$ ?? Shipping back to you

-NOTICE- OLD STYLE UMP lowers require some extra milling and fitting, add $20 for those old lowers.

For USC conversions For USC Kit price just add the price of the three parts you choose from the four available ( See listed barrel and stock prices) don't forget if using a M16 or AK style folding stock, the stock will count one US made compliance part)

For USC 3 parts Kit price , Trigger, floorplate, follower - only $150 (save purchasing the Combo)

Note that this is compatible with HK UMP, G36, SL8 and USC, with rounded edges NOT sharp edges like others, and also ALL STEEL construction not aluminum like other after market part.

HK UMP Follower (compliance part) - $22.00 (CNC from T7 aluminum billet, Type III Mil Specs Hard Coat anodized) (Not a homemade plastic part from elsewhere) (in stock)

Those are made out of steel, NOT steel and aluminum, they are easy and fast to open/close and have a positive lock in and even a no-play set screw. It's compatible with all ACE brand attachments, you can use it in a large variety of firearms, HK, AK, Daewoo, AR15/M16, SIG 556, FAL, AR180 and others.

Push Pin Hinge and hardware (all steel) - $58 (in stock) (introduction price!! over $30 cheaper from other brands made from aluminum )

Those are made out of hi quality aircraft grade aluminum, tubes are also aluminum, NOT plastic. Sturdy and made to outlast your firearm. Compatible with HDPS all steel hinges and all ACE brand accessories, you can use it in a large variety of firearms, HK, AK, Daewoo, AR15/M16, SIG 556, FAL, AR180 and others. Stocks size is 8.5", which will give the same total length of the UMP folding stock set up.

HDPS Skeleton Stock and hardware - $48 (in stock) (introduction price!! over $20 cheaper from others brands with top tube made from plastic)

- With this combo set you have everything you need to legally convert your standard USC Thumbhole Stock and 10 rounds mag to UMP Pistol Grip and hi capacity mag. All HK German parts are new, the 3 U.S. HDPS made compliance parts are already installed (steel trigger, follower and floor plate), the lower already serviced to make it compatible with the USC upper. The only thing you will need to do is take off a small portion of material from your upper so the UMP large capacity mag can work with it, instructions attached.

PARTS- HK UMP lower, 2 HK UMP magazines, HK UMP folding stock, HK Folding stock axle pin, HK UMP buffer, HK USC internals , HDPS stock block B with steel screws, HDPS steel trigger, 2 HDPS mag followers and 2 floor plates.

SERVICE INCLUDED- Fill and Mill auto sear area, make UMP lower compatible with USC upper, replace all UMP parts with USC parts, replace mag followers and floor plates and for the NAVY style UMP lowers, invert white mark on right side USC selector.

COMBO with FBI Style UMP lower - $ 1,195.00 You will need send your USC lower in order to use your semi auto internals (IN STOCK)

COMBO with NAVY or 4 Position Style UMP lower - $ 1,225.00 You will need send your USC lower in order to use your semi auto internals (IN STOCK)

Mill UMP Bolt to work with USC receiver - $95 (done right without heat transfer)

Also, check on Parts section more photos of our new improve top rail for UMP/USC

UMP/USC Long Top Rail and 2 Low Profile Screws , NO sharp edges -$ 40.00 (in stock)

UMP/USC Short Front Rail and 2 Low Profile Screws NO sharp edges - $ 30.00 (in stock)

UMP/USC Set of Rails/screws in blister pack NO sharp edges - $ 125.00 (in stock again!!)

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.

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

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.

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.

Also, about 9mm barrels, we are not offering them because would be the same of selling a car without an engine as the HK UMP 9mm bolts are not available for sale and very difficult (and expensive) to find.

If you want a HK UMP conversion done in 9mm, make sure to ONLY USE HK parts, several people that purchased after market brand of UMP and USC 9mm barrels ended up with an expensive paper weight due to specifications and not being able to find a 9mm bolt.

ATTENTION, I just saw one HK UMP folding stock new production out of their own factory specifications, date code is - AI .

ATTENTION, before you send a conversion in, please pay attention on your hammer first.

Hammer without a relieve in the right side will be problematic, usually they are found in the G36 lower grips and old early SL8-1, they will not work in the USC/UMP unless the relieve is made.

ATTENTION, If you are purchasing a second hand USC, make sure that the upper receiver was not milled out in order to fire in full auto like in the above photo. The receiver itself will be considered an illegal machine gun.

Before sending any USC upper receiver to HDPS CORP. for services make sure it is not illegal, in the case I receive an illegal machine gun upper receiver I will be required to render it to BATFE.

Several brand names are cited on this site like COLT, SIG, H&K, UZI, FN, those are registered trademarks of those brand names, and are used here as a reference to the genuine COLT, SIG, H&K, UZI parts that HDPS CORP sells, or because HDPS CORP offer services on COLT, SIG, H&K, UZI weapons. Is to be clear that HDPS CORP is not affiliated with COLT, SIG, H&K, UZI, FN in any other way.