UMP and USC Parts | Homeland Defense Police Supply https://www.hdps.org H&K HK PARTS USC UMP SL8 G36 Block B Rail set Conversion parts and services Wed, 04 Mar 2026 23:03:35 +0000 en-US hourly 1 https://wordpress.org/?v=7.0 https://www.hdps.org/wp-content/uploads/2020/10/cropped-hdps-favicon-32x32.png UMP and USC Parts | Homeland Defense Police Supply https://www.hdps.org 32 32 UMP Drop In Auto Sear Delete – DIAS-D https://www.hdps.org/product/ump-drop-in-auto-sear-delete-dias-d/ Wed, 04 Mar 2026 23:01:51 +0000 https://www.hdps.org/?post_type=product&p=5657 HECKLER AND KOCH UMP LOWER RECEIVER AUTO DIAS DROP IN  DELETE This is a DIY, removing the Auto Sear and ALL models of HK UMP lowers and replacing with this Carbon Fiber block. That alone will free you from any legal worries]]>

]]> Heckler and Koch factory German UMP Foldind Stock https://www.hdps.org/product/heckler-and-koch-factory-german-ump-foldind-stock/ Sat, 31 Aug 2024 21:20:52 +0000 https://www.hdps.org/?post_type=product&p=5331 HK UMP Folding Stock, Real factory German made not U.S. after market made *be careful with lower prices, you get lower quality"]]> HK UMP Folding Stock, Real factory German made not U.S. after market made *be careful with lower prices, you get lower quality"]]> B&T APC UMP USC CONVERSION FOLDING STOCK – Brugger & Thomet (made in Swiss) https://www.hdps.org/product/bt-apc-ump-usc-conversion-folding-stock-brugger-thomet-made-in-swiss/ Mon, 05 Jun 2023 19:46:36 +0000 http://hdps.org/?post_type=product&p=4873 ATTENTION - Be aware that HDPS CORP is the only maker of Conversion Blocks (B and C) for the Heckler and Koch USC to UMP conversion. We have received emails with problematic Blocks made and sold by other manufacturer claiming to be a Block B. MAKE SURE IT IS ENGRAVED as you see in photos to avoid fitting problems with counterfeit Block B's B&T APC UMP USC CONVERSION FOLDING STOCK - Brugger & Thomet (made in Swiss) Will fit ALL B&T APC Models in all calibers. Can be used for your USC to UMP conversion if you want a shorter stock than the HK UMP stock. Be aware that this stock will work perfectly with the Block B, but because was not made for the UMP it will leave a small gap between stock and block back wall or real UMP receiver end.]]> ATTENTION - Be aware that HDPS CORP is the only maker of Conversion Blocks (B and C) for the Heckler and Koch USC to UMP conversion. We have received emails with problematic Blocks made and sold by other manufacturer claiming to be a Block B. MAKE SURE IT IS ENGRAVED as you see in photos to avoid fitting problems with counterfeit Block B's B&T APC UMP USC CONVERSION FOLDING STOCK - Brugger & Thomet (made in Swiss) Will fit ALL B&T APC Models in all calibers. Can be used for your USC to UMP conversion if you want a shorter stock than the HK UMP stock. Be aware that this stock will work perfectly with the Block B, but because was not made for the UMP it will leave a small gap between stock and block back wall or real UMP receiver end.]]> ATI 5 Position Vertical Grip – Variable Vertical Foregrip https://www.hdps.org/product/ati-5-position-vertical-grip-variable-vertical-foregrip/ Thu, 01 Jun 2023 22:01:43 +0000 http://hdps.org/?post_type=product&p=4864
ATI 5 Position Vertical Grip - Variable Vertical Foregrip
ATI 5 Position Vertical Grip - Variable Vertical Foregrip - Image 2
ATI 5 Position Vertical Grip - Variable Vertical Foregrip - Image 3
ATI 5 Position Vertical Grip - Variable Vertical Foregrip - Image 4
ATI 5 Position Vertical Grip - Variable Vertical Foregrip - Image 5

ATI 5 Position Vertical Grip – Variable Vertical Foregrip

$29.75

ATI 5 Position Vertical Grip

Push button Variable Vertical Foregrip for Picatinny Rails

Made in USA – Lifetime Warranty

Out of stock

Categories: , , ,

Additional information

Weight 0.5 lbs
Dimensions 8 × 6 × 2 in

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]]> FAB Defense Vertical Grip – 7 Position Vertically Folding Foregrip https://www.hdps.org/product/fab-defense-vertical-grip-7-position-vertically-folding-foregrip/ Thu, 01 Jun 2023 21:25:35 +0000 http://hdps.org/?post_type=product&p=4855 UMP HDPS 7.87″ THREADED .578×28 RH  STAINLESS STEEL FINISHED IN CERAKOTE BARREL for HK UMP AND USC (Compliance Part) (Copy) https://www.hdps.org/product/ump-hdps-7-87%e2%80%b3-threaded-578x28-rh-stainless-steel-finished-in-cerakote-barrel-for-hk-ump-and-usc-compliance-part-copy/ Tue, 16 May 2023 18:21:31 +0000 http://hdps.org/?post_type=product&p=4839 IN STOCK!

UMP HDPS 7.87″ THREADED .578x28 RH BARREL - STAINLESS STEEL FINISHED WITH CERAKOTE  FOR HK UMP AND USC

THE BEST BARREL ALL THE WAY AROUND FOR HK UMP or SBR USC Threaded .578x28 RH
Those barrels are made from blanks, turned on centers, machine finish. Stress relieved & Air gaged to +/- .0002″.  Our barrels are 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 so All barrels are compatible with USC bolt/carrier AND UMP bolt/carrier!!
]]> IN STOCK!

UMP HDPS 7.87″ THREADED .578x28 RH BARREL - STAINLESS STEEL FINISHED WITH CERAKOTE  FOR HK UMP AND USC

THE BEST BARREL ALL THE WAY AROUND FOR HK UMP or SBR USC Threaded .578x28 RH
Those barrels are made from blanks, turned on centers, machine finish. Stress relieved & Air gaged to +/- .0002″.  Our barrels are 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 so All barrels are compatible with USC bolt/carrier AND UMP bolt/carrier!!
]]> UMP HDPS 7.87″ THREADED .578×28 RH  STAINLESS STEEL FINISHED IN CERAKOTE BARREL for HK UMP AND USC (Compliance Part) https://www.hdps.org/product/ump-hdps-7-87%e2%80%b3-threaded-578x28-rh-stainless-steel-ceracoated-barrel-hk-ump-and-usc/ Mon, 15 May 2023 04:15:17 +0000 http://hdps.org/?post_type=product&p=4819 IN STOCK

UMP HDPS 7.87″ THREADED .578x28 RH BARREL - STAINLESS STEEL FINISHED WITH CERAKOTE  FOR HK UMP AND USC

THE BEST BARREL ALL THE WAY AROUND FOR HK UMP or SBR USC Threaded .578x28 RH
Those barrels are made from blanks, turned on centers, machine finish. Stress relieved & Air gaged to +/- .0002″.  Our barrels are 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 so All barrels are compatible with USC bolt/carrier AND UMP bolt/carrier!!
]]> IN STOCK

UMP HDPS 7.87″ THREADED .578x28 RH BARREL - STAINLESS STEEL FINISHED WITH CERAKOTE  FOR HK UMP AND USC

THE BEST BARREL ALL THE WAY AROUND FOR HK UMP or SBR USC Threaded .578x28 RH
Those barrels are made from blanks, turned on centers, machine finish. Stress relieved & Air gaged to +/- .0002″.  Our barrels are 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 so All barrels are compatible with USC bolt/carrier AND UMP bolt/carrier!!
]]> Heckler and Koch UMP and USC Trigger Spring https://www.hdps.org/product/heckler-and-koch-ump-and-usc-trigger-spring/ Fri, 26 Mar 2021 04:54:32 +0000 http://hdps.org/?post_type=product&p=3756 Heckler and Koch UMP and USC Trigger Spring
  • Good spare part to have, spring do go bad
]]> Heckler and Koch UMP and USC Trigger Spring
  • Good spare part to have, spring do go bad
]]> Heckler and Koch UMP and USC Hammer Springs RH & LH ((N E W)) https://www.hdps.org/product/heckler-and-koch-ump-and-usc-hammer-springs-rh-lh-n-e-w/ Fri, 26 Mar 2021 04:51:07 +0000 http://hdps.org/?post_type=product&p=3754 Heckler and Koch UMP and USC Hammer Springs RH & LH (NEW)
  • These spring will get weak over the time, a must to have as spares
  • When light primer strikes starts to happen, it is time to change them
]]> Heckler and Koch UMP and USC Hammer Springs RH & LH (NEW)
  • These spring will get weak over the time, a must to have as spares
  • When light primer strikes starts to happen, it is time to change them
]]> Heckler and Koch UMP and G36 (all) Hammer NEW https://www.hdps.org/product/heckler-and-koch-ump-and-g36-all-hammer-new/ Fri, 26 Mar 2021 04:22:13 +0000 http://hdps.org/?post_type=product&p=3749 Heckler and Koch UMP and G36 (all) Hammer NEW For Full Auto Hk UMP's and G36's only, will not work with USC internals]]> Heckler and Koch UMP and G36 (all) Hammer NEW For Full Auto Hk UMP's and G36's only, will not work with USC internals]]>