Magazines / Extensions / Brass Catchers

Magazines / Extensions / Brass Catchers

Explore our extensive selection of HK magazines and extensions designed for enhanced capacity and performance across a range of HK models including the VP9, USP, MP5, and more. From rugged steel magazines to advanced polymer extensions, our inventory caters to both tactical and recreational needs, ensuring reliable feeding and durability. Enhance your HK firearm with precision-engineered magazine upgrades, available now for various calibers and applications.

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  • On Sale
    New - HKP HK45 +5 Magazine Extension Kit - HKP-20809-M HK45 +5 Magazine Extension Kit
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    HK45 +5 Magazine Extension Kit

    HKP HK Parts

    Now: $51.96
    Was: $64.95
    HKP HK45 +5 Magazine Extension Kit HK Parts magazine extension +5 kit adds 5 additional rounds to the HK45 magazine with the simple swap of the floor plate & high-reliability mag spring.  HKP highly recommends using a magazine loader when...
    Now: $51.96
    Was: $64.95
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  • On Sale
    New - H&K 12 Round HK USP .45 ACP Extended Floor Plate - HKP-00920
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    HK USP Extended Floorplate - .45 ACP - 12 Round

    H&K Heckler & Koch

    Now: $9.45
    Was: $10.50
    HK USP 45 12 Round Magazine Floor Plate - Extended A great spare to have on hand as these are prone to breakage if mags are dropped on hard surfaces. Compatible With: All HK USP 45 full size & USP 45 Tactical 12 round magazines.
    Now: $9.45
    Was: $10.50
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  • On Sale
    Used - HKP - 17 Round HK45 Magazine - HKP-20787 HK45 Magazine - 17 Round
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    HK45 Magazine - 17 Round

    HKP HK Parts / Heckler & Koch

    Now: $107.95
    Was: $119.95
    HKP - 17 Round HK45 Magazine HK45 & HK45 tactical +7 magazine extension coupled with a new HK German 10 round HK45 magazine. Each unit is then fully assembled as a 17 round HK45, HK45 tactical magazine. Ideal for competition shooters that would like...
    Now: $107.95
    Was: $119.95
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  • On Sale
    New - H&K 8 Round HK USPC/45C .45 ACP Floorplate - Black - HKP-01454 HK45C, USPC Floorplate - 8 Round
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    HK45C, USPC Floorplate - 8 Round

    H&K Heckler & Koch

    Now: $58.46
    Was: $64.95
    H&K 8 Round HK USPC/45C .45 ACP Floorplate Brand new German HK manufacture. Compatible With: HK45 Compact, HK45 Tactical HK USP Compact 45, HK USPC Tactical
    Now: $58.46
    Was: $64.95
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  • On Sale
    New - H&K 20 Round HK MR556/416 Magazine - Black - HKP-00029 HK416, MR556 Magazine - 20 Round
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    HK416, MR556 Magazine - 20 Round

    H&K Heckler & Koch

    Now: $67.45
    Was: $74.95
    H&K 20 Round HK MR556 & 416 5.56/.223 Magazine New HK416 and MR556 Factory 20 Round Steel Maritime Coated Magazine. Will fit and work in all AR-15/M16 weapons. Perfect for those who need a lower profile magazine or who will be doing prone or...
    Now: $67.45
    Was: $74.95
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  • On Sale
    HK MP5, MP5K Magazine - 20 Round Mora Arms HKP-22361 HK MP5, MP5K Magazine - 20 Round Mora Arms HKP-22361
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    HK MP5, MP5K Magazine - 20 Round

    Mora Arms

    Now: $26.95
    Was: $29.95
    Mora Arms HK MP5, MP5K Magazine - 20 Round 20-round curved steel magazine for MP5 platforms. Compatible With:  HK MP5, SP5 HK MP5K, SP5K HK SP89 HK 94 Clones and Custom Builds
    Now: $26.95
    Was: $29.95
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  • Out Of Stock
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    New - HKP HK 91/G3/PSG1/HK11 50 Round Drum Magazine - HKP-21615 HK91, G3, PSG1, HK11 Magazine - 50 Round Drum

    HK91, G3, PSG1, HK11 Magazine - 50 Round Drum

    HKP HK Parts

    Now: $287.96
    Was: $359.95
    HKP 50 Round Drum HK91, G3, PSG1/MSG90, HK11 - 7.62x51/.308 Modeled after the discontinued HK G8 50 round drum, the HK Parts drum steps in where the original left off.  Each drum is crafted in the US from billet aluminum with aluminum and steel...
    Now: $287.96
    Was: $359.95
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    Was: $359.95
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  • On Sale
    New - H&K 10 Round HK VP9/VP40/USP Series/P Series Magazine Spring - HKP-01428
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    HK VP9, VP40, USP Series, P Series Magazine Spring - 10 Round

    H&K Heckler & Koch

    Now: $6.25
    Was: $6.95
    New German HK Magazine Spring For 10 Round Magazines A must-have part as magazine springs are high wear and a common replacement item. Compatible With: HK USP 9mm HK USP 40 S&W HK USP Compact 9mm HK USP Compact 40 S&W HK USP Compact 357 SIG HK...
    Now: $6.25
    Was: $6.95
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  • On Sale
    New - H&K 10 Round HK Mark 23/SOCOM .45 ACP Magazine - HKP-01226-M HK 10 Round HK Mark 23/SOCOM .45 ACP Magazine
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    HK 10 Round HK Mark 23/SOCOM .45 ACP Magazine

    H&K Heckler & Koch

    Now: $53.10
    Was: $59.00
    HK Mark23 SOCOM 10 Round Magazine Fits all HK Mark 23 and or Socom pistols.
    Now: $53.10
    Was: $59.00
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    Was: $59.00
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  • On Sale
    New - GSG/Sig Sauer/Kimber Magazine Spring - HKP-02795 GSG5, SIG Magazine Spring - Kimber - 1911 .22LR conversions
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    GSG5, SIG Magazine Spring - Kimber - 1911 .22LR conversions

    GSG German Sports Guns

    Now: $1.49
    Was: $3.95
    GSG/Sig Sauer/Kimber Magazine Spring German-made spare magazine spring for your 10-round 1911 magazine. Compatible With:  GSG5 1911 SIG Kimber & many other guns that use this style of magazine for the 1911 .22 conversions. 
    Now: $1.49
    Was: $3.95
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  • Out Of Stock
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    New - Zenith 30 Round HK MP5 Magazine - LEO Marked - HKP-21612 HK MP5 Magazine - 30 Round - LEO Marked

    HK MP5 Magazine - 30 Round - LEO Marked

    Zenith

    Now: $47.66
    Was: $52.95
    Zenith 30 Round HK MP5 Magazine - - LEO Marked Replica LEO laser markings that closely resemble those found on factory magazines. These markings are expertly lasered onto Zenith magazines, successfully emulating the sought-after LEO markings of authentic...
    Now: $47.66
    Was: $52.95
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  • New - HKP +2 HK 45C Finger Rest Magazine Extension - Black - HKP-17999 HKP +2 HK 45C Finger Rest Magazine Extension
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    HKP +2 HK 45C Finger Rest Magazine Extension

    HKP HK Parts

    $29.95
    HK45C 8 Round Magazine +2 Magazine Extension/Finger Rest All of the HK .45 cal mags will soon have a variety of mag extensions! More to come. HK45C 8 round +2 mag extensions. Replaces the floorplate for a +2 round addition for a total of 10 rounds in the...
    $29.95
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