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9mm Conversion Kit 16.5" Barrel - HK USC, UMP

SKU: HKP-02284

HK UMP 9mm Conversion Kit US made 9mm

UMP/USC conversion kit will convert existing USC-UMP conversions to 9mm. This is a simple drop in conversion for those that have already done the USC-UMP conversion. The conversion parts are drop in with the total swap over of parts taking about 5 mins.

Each kit includes:

  • 9mm Barrel UMP/USC
    • 16.5" fluted chamber barrel
    • 16 Flute barrel (factory correct)
    • Only available through HKParts.net


  • 9mm Bolt Carrier
    • Tungsten Filled
    • 9mm Extractor
    • Retaining Pin for firing pin
    • * Use your own USC/UMP firing pin & spring*
  • 9mm 30 Round Magazine (HK German Factory)

This is the ONLY UMP 9mm kit available built to factory specifications with 16 flute chambered barrels & tungsten filled carriers. If you need a F/A carrier (only fits UMP factory recievers) please make a note when checking out. Please select bolt carrier type that you need for your conversion. Semi-auto bolt carrier for HK USC conversions or full-auto for HK UMP SMG's.

Each 9mm kit gives you 2 of the 3 needed 922 compliant parts needed (barrel and bolt). Please note that the full auto bolt carrier will not work in the HK USC. All NFA rules apply.

Condition: New
Origin: USA
Caliber: 9mm
Magazine Type: Magazine
Magazine Capacity: 30
922r Value: 2
Price: $889.95$1,000.0011% OFF
In Stock
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9mm Conversion Kit 16.5" Barrel - HK USC, UMP
9mm Conversion Kit 16.5" Barrel - HK USC, UMP
9mm Conversion Kit 16.5" Barrel - HK USC, UMP
9mm Conversion Kit 16.5" Barrel - HK USC, UMP
9mm Conversion Kit 16.5" Barrel - HK USC, UMP
9mm Conversion Kit 16.5" Barrel - HK USC, UMP
9mm Conversion Kit 16.5" Barrel - HK USC, UMP
9mm Conversion Kit 16.5" Barrel - HK USC, UMP
9mm Conversion Kit 16.5" Barrel - HK USC, UMP
9mm Conversion Kit 16.5" Barrel - HK USC, UMP
9mm Conversion Kit 16.5" Barrel - HK USC, UMP
9mm Conversion Kit 16.5" Barrel - HK USC, UMP
9mm Conversion Kit 16.5" Barrel - HK USC, UMP
9mm Conversion Kit 16.5" Barrel - HK USC, UMP
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Product Reviews

Write your own review


"USC to UMP 9mm Conversion Kit"

David Pelsue on 8/27/2011 4:58:56 PMVerified

Overall Product Rating:


I ordered this from trusted and proven HKParts and at first had reservations because I hadn't researched the process fully. Earlier posts described machining parts etc. and once I received their kit, I was quite relieved! Everything fit perfect, no mods necessary and finishing my conversion was a snap. This kit also gave me two 922r parts right off the bat! I bought the US made stock to be fully compliant. With an FBI UMP lower, HPDS block and a Dremel, I was finished with my conversion in rough... More details


"Super product shoots like a dream...fast shipping what can I say more"

Dustin Wiley on 5/27/2011 2:40:23 PM

Overall Product Rating:


Ordered yesterday came today (these guys do a great job in getting me what I need fast), the machining is 1st class to say the least. Took me about 5 mins to swap barrels, and bolt. Everything was super tight no slop whatsoever, stepped outside on the porch and dumped a mag for function. No stoppages or issues and the recoil on the 9mm is amazingly light to say the least. Buy with confidence as hkparts has always been able to make me smile on all my parts orders.


"9mm USC/UMP kit"

Stephen W. on 8/11/2016 1:00:19 PM

Overall Product Rating:


Purchased this kit back in February and decided to wait before making a review. I have had much time enjoying this kit, and decided it was time to review. I also purchased a new firing pin and spring so I would not have to keep switching it from one bolt to the other. The entire conversion took about 5 mins at most. I really like the amount of weight the barrel fells like it sheds from the front of the firearm compared to the .45 acp. It shoots good tight groups and have not had a single problem... More details


"Great kit"

Dennis V on 1/26/2012 11:16:36 AM

Overall Product Rating:


Converted in minutes.


"9mm USC/UMP Kit"

David V on 5/22/2012 12:14:49 PM

Overall Product Rating:


Works great. I followed the step by step video on the website and it worked perfectly. I've shot over 500 rounds without any problems.


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