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HK UMP .45 Cal Conversion Kit


HK UMP .45 Cal Conversion Kit features

  • HK Parts .45 UMP Barrel 
  • .45 Bolt carrier USA
  • .45 US Mag with steel feed lips
  • Includes Extractor USA
  • Includes Firing pin Retaining Pin USA
  • Marked .45 Auto just like the OEM carrier USA

These kits can convert your semi auto HK UMP or Gideon 9mm or .40 to .45 cal. 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. New USA made .45 cal 8" barrel for the UMP or Omega firearms. Each barrel is threaded 16 x 1 LH and 3 lug tipped. The finest barrel for the UMP .45 on the market.



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Atlantic Firearms,llc
10337 Bunting Road
Bishopville, MD 21813
Office: (410) 352-5183
Voice: (410) 352-5183
Fax: (410) 352-3374