Caliber Conversion Kits
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Out Of Stock
DTAC HK MP5SD Front End Kit
DTAC Dakota Tactical
$1,199.95Dakota Tactical HK MP5SD Front End Kit If you have wanted to convert that MP5 or SP5 to an SD but didn't know where to start, look no further. Our kit provides all necessary components (aside from suppressor) to do so. With a DTAC Cage and SD guard...HKP-21318$1,199.95 -
Out Of Stock
MM HK UMP 9mm Conversion Kit - 16 inch Barrel
Michaels Machines
$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...HKP-02284$889.95 -
Out Of Stock
H&K 91/G3 (.22LR) Conversion Kit - USED
H&K Heckler & Koch
$0.00Used Surplus Genuine German HK G3 .22 caliber conversion kit Convert any HK91 or G3 rifle to cycle cheaper .22LR ammunition with this genuine HK caliber conversion kit. Great for training or just plinking. Each kit includes bolt group, barrel...HKP-01147$0.00 -
Out Of Stock
CQT FX Simunition Conversion Kit for MP5 - 9mm - Used
Simunition
$179.95CQT FX Simunition Conversion Kit for MP5 - 9mm - Used The CQT FX simunition conversion kit is in excellent, like-new condition and comes with original factory packaging. This is your chance to grab one of the last remaining units, so don’t...HKP-20648$179.95 -
H&K UMP (.40 S&W) Conversion Kit - Used
H&K Heckler & Koch
$1,087.95HK UMP .40 Caliber Conversion Kit This UMP conversion kit provides the necessary components to convert .45 sub-guns to .40 caliber. Machined bolt carriers are available for USC/UMP conversion sub-guns. This is a simple, drop-in conversion requiring a...HKP-00729$1,087.95 -
H&K HK UMP .45 Conversion Kit
$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...HKP-20623$1,099.95 -
MM HK UMP 9mm Conversion Kit
Michaels Machines
$1,293.95HK UMP & USC 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 who have already done the USC-UMP conversion. The conversion parts are drop-in with...HKP-02286$1,293.95 -
MM HK UMP (.40 S&W) Conversion Kit
Michaels Machines
$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...HKP-18754$999.95 -
On Sale
CQT FX Simunition Conversion Kit for MP5 - 9mm - Blue - USED
Simunition
Now: $97.95Was: $179.95CQT FX Simunition Conversion Kit for MP5 - 9mm - Used COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. The CQT FX simunition conversion kit is in excellent,...HKP-20648-BU-BNow: $97.95Was: $179.95 -
On Sale
CQT FX Simunition Conversion Kit for MP5 - 9mm - Grey - USED
Simunition
Now: $97.95Was: $179.95CQT FX Simunition Conversion Kit for MP5 - 9mm - Grey - USED COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. The CQT FX simunition conversion...HKP-20648-GY-BNow: $97.95Was: $179.95 -
On Sale
CQT FX Simunition Conversion Kit for MP5 9mm - Grey - USED
Simunition
Now: $179.95Was: $319.95CQT FX Simunition Conversion Kit for MP5 9mm - Grey - USED The CQT FX Simunition conversion kit is in excellent, like-new condition and comes with original factory packaging. This is your chance to grab one of the last remaining units, so...HKP-99066Now: $179.95Was: $319.95 -
Out Of Stock
H&K HK VP9 to HK VP9 Long Slide Conversion Kit - Black
H&K Heckler & Koch
$0.00H&K HK VP9 to HK VP9 Long Slide Conversion Kit - Black Compatible With: HK VP9 Features: Slide assembly with rear serrations, charging supports, and forward serrations / lightening cuts O-ring enhanced barrel, optimized and fit for...HKP-19040$0.00 -
Out Of Stock
HKP HK UMP 9mm Conversion Kit -Threaded 1/2x28
HKP HK Parts
$679.95HKP HK UMP 9mm Conversion Kit -Threaded 1/2x28 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...HKP-02287$679.95 -
Out Of Stock
HKP/H&K UMP 9mm Conversion Kit - Threaded Barrel 1/2x28 - 3-Lug
HKP HK Parts
$999.95HKP/H&K UMP 9mm Conversion Kit - Threaded Barrel 1/2x28 - 3-Lug 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 total...HKP-02285$999.95