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HK UMP .40 Caliber Conversion Kit

SKU: HKP-00729

HK UMP 40 Caliber Conversion Kit

With this UMP Conversion kit, UMP .45 sub guns can be converted to .40 caliber. Machined bolt carriers are available for USC/UMP conversion sub guns. This is a simple drop-in conversion. The time required to change calibers is about 5 minutes.

    UMP .40 Caliber Conversion Kit includes:
  • UMP .40 Barrel
    • 7.87"UMP German Polygonal Barrel With Flange
    • HK Cold Hammer Forged
  • Bolt Carrier
    • HK German UMP .40 Bolt Group Complete
    • Ready To Drop In Your UMP
    • Also Available Upon Request Milled For USC Conversions
  • Magazine
    • 30 Round
    • Black Polymer
  • All parts are factory correct German HK.40 S&W Parts
  • All parts are genuine HK German Used in Good Shape Or Better
Condition: Used
Origin: German
Caliber: 40 S&W
Price: $929.95
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HK UMP .40 Caliber Conversion Kit
HK UMP .40 Caliber Conversion Kit
HK UMP .40 Caliber Conversion Kit
HK UMP .40 Caliber Conversion Kit
HK UMP .40 Caliber Conversion Kit
HK UMP .40 Caliber Conversion Kit
HK UMP .40 Caliber Conversion Kit
HK UMP .40 Caliber Conversion Kit
HK UMP .40 Caliber Conversion Kit
HK UMP .40 Caliber Conversion Kit
HK UMP .40 Caliber Conversion Kit
HK UMP .40 Caliber Conversion Kit
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HK UMP .40 Caliber Conversion Kit is currently not available, but we thought you might be interested in these related items:

German UMP .45 Bolt Group - Used

German UMP .45 Bolt Group - Used

Price $599.95

Out of Stock


Product Reviews

Write your own review


"Nice change-over!"

Peter Lenton on 2/14/2012 3:50:55 PM

Overall Product Rating:


It's nice to have a firearm that converts calibers as easy as the USC/UMP, and thanks to Adam, we have the parts available to do it ( not to mention the machining to semi auto so the bolts fit our semi-autos)


"caliber change"

David Williams on 1/28/2013 10:57:43 AMVerified

Overall Product Rating:


This is a great kit. I can do a caliber change in about 2 minutes. with ammo sometimes hard to find, I can use any 9, .40 or .45


"Install of the conversion kit"

Peter Lenton on 2/15/2012 6:51:30 PM

Overall Product Rating:


(For some reason my message didn't come through completely) The caliber conversion is as easy as knocking out the barrel roll pin, removing the .45 barrel, and putting in the .40 barrel and replacing the barrel (and minding the ejector is in place) and dropping the machined bolt in. It takes maybe 5 minutes. It doesn't hurt to pick up the armorers manual from this site as well.