Caliber Conversion Kits

Caliber Conversion Kits

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  • HKP HK 416C 9" Complete Upper Receiver Assembly HKP HK 416C 9" Complete Upper Receiver Assembly

    HKP HK 416C 9" Complete Upper Receiver Assembly

    HKP HK Parts

    $2,799.95
    HK416C Complete Upper Kit - 9"  After years trying to get these back in. We finally bring you a rare unicorn of a find. With our complete 416c upper kit all that would be needed to complete this kit would be a mil-spec lower or a STS 416c lower...
    HKP-21042
    $2,799.95
    Qty in Cart: 0
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    $2,799.95
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  • Tommy Built HK USC Pistol Grip & Fixed Stock Tommy Built HK USC Pistol Grip & Fixed Stock

    Tommy Built HK USC Pistol Grip & Fixed Stock

    Tommy Built

    $449.99
    Tommy Built HK USC Pistol Grip & Fixed Stock This bolt-on fixed UMP style stock and pistol grip for the USC rifle is a great solutionif you can’t have a folding stock or high-cap mag and dont want to go through the expense of a full UMP...
    HKP-21361
    $449.99
    Qty in Cart: 0
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    $449.99
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  • CQT FX Simunition Conversion Kit for MP5 - 9mm - Used CQT FX Simunition Conversion Kit for MP5 - 9mm - Used

    CQT FX Simunition Conversion Kit for MP5 - 9mm - Used

    Simunition

    $149.95
    CQT FX Simunition Conversion Kit for MP5 - 9mm - Used   Used in good condition.   Includes: Barrel insert Locking piece Barrel muzzle clamp
    HKP-20648
    $149.95
    Qty in Cart: 0
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    $149.95
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  • Out Of Stock
    H&K 91/G3 (.22LR) Conversion Kit H&K 91/G3 (.22LR) Conversion Kit

    H&K 91/G3 (.22LR) Conversion Kit

    H&K Heckler & Koch

    $0.00
    Used Surplus Genuine German HK G3 .22 caliber conversion kit Fits and converts all HK91, G3 rifles to shoot the cheap and readily affordable .22 LR ammunition. Includes bolt group, barrel tube, 1 magazine, and cleaning kit and wooden green case. NO...
    HKP-01147
    $0.00
    Qty in Cart: 0
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    $0.00
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  • MM HK UMP 9mm Conversion Kit - 16 inch Barrel MM HK UMP 9mm Conversion Kit - 16 inch Barrel

    MM HK UMP 9mm Conversion Kit - 16 inch Barrel

    Michaels Machines

    $889.95
    HK 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
    Qty in Cart: 0
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    $889.95
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  • DTAC HK MP5SD Front End Kit DTAC HK MP5SD Front End Kit

    DTAC HK MP5SD Front End Kit

    DTAC Dakota Tactical

    $1,199.95
    Dakota 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
    Qty in Cart: 0
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    $1,199.95
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  • MM HK UMP (.40 S&W) Conversion Kit MM HK UMP (.40 S&W) Conversion Kit

    MM HK UMP (.40 S&W) Conversion Kit

    Michaels Machines

    $999.95
    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...
    HKP-18754
    $999.95
    Qty in Cart: 0
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    $999.95
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  • MM HK UMP 9mm Conversion Kit MM HK UMP 9mm Conversion Kit

    MM HK UMP 9mm Conversion Kit

    Michaels Machines

    $889.95
    HK 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
    $889.95
    Qty in Cart: 0
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    $889.95
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  • Out Of Stock
    GSG9 HK G36C .300 BLK Parts Kit

    GSG9 HK G36C .300 BLK Parts Kit

    GSG9

    $2,049.00
    HK G36C .300 Blackout Caliber Parts Kit- USA Complete G36C Semi-Auto Parts Kit. This kit includes all parts needed for a complete build minus the receiver. The barrel and gas block are Black Nitride coated for longevity and resistance against wear and...
    HKP-18704
    $2,049.00
    Qty in Cart: 0
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    $2,049.00
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  • H&K HK UMP .45 Conversion Kit H&K HK UMP .45 Conversion Kit

    H&K HK UMP .45 Conversion Kit

    $1,099.95
    H&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
    Qty in Cart: 0
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    $1,099.95
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  • Out Of Stock
    H&K HK VP9 to HK VP9 Long Slide Conversion Kit - Black H&K HK VP9 to HK VP9 Long Slide Conversion Kit - Black

    H&K HK VP9 to HK VP9 Long Slide Conversion Kit - Black

    H&K Heckler & Koch

    $0.00
    Features: Slide assembly with rear serrations, charging supports, and forward serrations / lightening cuts O-ring enhanced barrel, optimized and fit for accuracy Complete small parts and fire control including back plate, striker assembly, and drop...
    HKP-19040
    $0.00
    Qty in Cart: 0
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    $0.00
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  • H&K UMP (.40 S&W) Conversion Kit - Used H&K UMP (.40 S&W) Conversion Kit - Used

    H&K UMP (.40 S&W) Conversion Kit - Used

    H&K Heckler & Koch

    $1,087.95
    HK 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
    Qty in Cart: 0
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    $1,087.95
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  • HKP HK UMP (9mm) Conversion Kit - 3 Lug - Threaded Barrel 1/2 x 28 HKP HK UMP (9mm) Conversion Kit - 3 Lug - Threaded Barrel 1/2 x 28

    HKP HK UMP (9mm) Conversion Kit - 3 Lug - Threaded Barrel 1/2 x 28

    HKP HK Parts

    $999.95
    HK UMP 9mm Conversersion Kit - USA - 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 total conversion requires approximately...
    HKP-02285
    $999.95
    Qty in Cart: 0
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    $999.95
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  • Out Of Stock
    HKP HK UMP (9mm) Conversion Kit -Threaded 1/2 x 28 HKP HK UMP (9mm) Conversion Kit -Threaded 1/2 x 28

    HKP HK UMP (9mm) Conversion Kit -Threaded 1/2 x 28

    HKP HK Parts

    $679.95
    HK UMP 9mm Conversion Kit - Threaded Barrel 1/2 x 28 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...
    HKP-02287
    $679.95
    Qty in Cart: 0
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    $679.95
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  • Out Of Stock
    Tommy Built HK G36C .300 BLK Conversion Kit Tommy Built HK G36C .300 BLK Conversion Kit

    Tommy Built HK G36C .300 BLK Conversion Kit

    Tommy Built

    $874.95
    HK G36C 556/223 To .300 Blackout Caliber Conversion - USA The Tom Bostic .300 BLK conversion barrel set up is designed to drop in any G36C or Sl8 to G36C conversion and reuse your G36C op-rod/spring set, gas piston & barrel nut. Each set up comes...
    HKP-18268
    $874.95
    Qty in Cart: 0
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    $874.95
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