Caliber Conversion Kits
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Out Of StockOn Sale
HK UMP Caliber Conversion to 9mm Kit - 16.5" Barrel - 30 Round Magazine
Michaels Machines
Now: $800.96Was: $889.95HK UMP 9mm Conversion Kit - US-Made UMP/USC conversion kit will convert existing USC-UMP conversions to 9mm. This is a simple drop-in conversion for those who have already done the USC-UMP conversion. The conversion parts are drop-in, with the total swap...Now: $800.96Was: $889.95 -
On Sale
HK UMP .45 Conversion Kit
Now: $989.96Was: $1,099.95H&K HK UMP .45 Conversion Kit This kit optimizes the UMP platform by allowing the user swap between calibers in approximately 5 minutes. The Michael's machine semi-auto bolt pairs perfectly with the TPM and Gideon Shadow receivers as well as USC to...Now: $989.96Was: $1,099.95 -
On Sale
HK UMP Caliber Conversion to .40 S&W Kit - 7.87" Barrel - 30 Round Magazine
Michaels Machines
Now: $899.96Was: $999.95HK 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...Now: $899.96Was: $999.95 -
On Sale
HK91, G3 Caliber Conversion Kit - .22LR - BLEMISHED
H&K Heckler & Koch
Now: $709.46Was: $945.95Heckler and Koch HK G3, HK91 .22LR Caliber Conversion Kit - BLEMISHED THESE KITS INCLUDE A BENT BARREL AND ONE MAGAZINE. BLEMISHED PARTS ARE SOLD AS IS. THIS KIT IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. Convert any HK91 or HK...Now: $709.46Was: $945.95 -
Out Of StockOn Sale
HK UMP, USC Kit - Caliber Conversion - 9mm - 30 Round
HKP HK Parts
Now: $799.96Was: $999.95HK Parts and Heckler and Koch HK UMP and HK USC 9mm Conversion Kit - Threaded Barrel 1/2x28 - 3-Lug This UMP, USC conversion kit will convert existing conversions to 9mm. This is a simple drop-in conversion for those who have already done the USC-UMP...Now: $799.96Was: $999.95