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Builders Kits

MDX Arms is your home for firearm accessories, gun parts, gunsmithing tools, reloading and shooting supplies backed by our 100% satisfaction guarantee.

  • SALE
    MDX Arms ARC19 G19 Build Kit

    MDX Arms ARC19 G19 Build Kit

    ARC19 Pre-Order: Est. Release Date: Sept 2019 Slide: Strike Industries ARC Stripped with RMR Cut and RMR Plate Cover Four Custom Port Cuts Aggressive Serration To Front & Rear Slide Ridges Pre-cut red dot sight universal mount Barrel: Strike...

    Was: $889.99
    Now: $789.99
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  • MDX Arms F2 G17 9mm Full Size P80 Builders Kit

    MDX Arms F2 G17 9mm Full Size P80 Builders Kit

    Uninstalled Parts Includes: F2 G17 CNC Slide Match Grade Nitride G17 9mm Barrel Shadow Systems Slide Internal Parts Kit OEM Guide Rod OEM Lower Parts Kit OEM Sight Set Polymer80 V2 Frame (your choice of any color) with JIG/Tooling Warning:MDX...

    $490.00
    Out of stock
  • SALE
    MDX Arms G17Comp 9mm Build Kit MDX Arms G17Comp 9mm Build Kit Slide Top View

    MDX Arms G17Comp 9mm Full Size Build Kit

    MDX Arms V1 G17 with Compensator in 9mm Full Size P80 Build Kit  Kit Includes: V1 OEM Style CNC Serrated Slide (Available in Cerakoted Black/FDE) Archon Glock Compensator 1/2x28 Standard Size  Shadow Systems Slide Internal Parts...

    $459.95 - $467.35
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  • SALE
    MDX Arms G19 EDC V5 Complete Build Kit with Jig/Tools MDX Arms G19 EDC V5 Complete Build Kit Parts

    MDX Arms G19 EDC V5 Complete Build Kit

    Our MDX Arms EDC V5 Complete G19 Build Kit Consists of the following: Alpha Sports EDC V5 with RMR Cut  Strike Industries Spiral Fluted ARC G19 Barrel Shawdow Systems Complete Slide Parts Kit Blacked Out AmeriGlo Suppressor Sights Polymer80...

    Was: $849.99
    Now: $729.95
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  • SALE
    MDX Arms G19Comp 9mm Compact Build Kit MDX Arms G19Comp 9mm Compact Build Kit with Black Comp Top View

    MDX Arms G19Comp 9mm Compact Build Kit

    MDX Arms V1 G19 with Compensator in 9mm Compact P80 Build Kit  Kit Includes: V1 OEM Style CNC Serrated Slide (Available in Cerakoted Black/FDE) Archon Glock Compensator 1/2x28 Standard Size  Shadow Systems Slide Internal Parts Kit Match...

    $459.95 - $467.35
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  • SALE
    MDX Arms G21 .45ACP Build Kit

    MDX Arms G21 .45ACP Build Kit

    This complete .45ACP G21 Complete Build Kit consist of everything you need (except mags and ammo)Slide Info: Skeletonized pocket patterns and window cut outs have been machined into this version to enhance aesthetics as well as reduce weight...

    Was: $699.99
    Now: $649.99
    Out of stock
  • SALE
    MDX Arms G22 .40S&W Polymer80 80% Build Kit

    MDX Arms G22 .40S&W Polymer80 80% Build Kit

    Our New MDX Arms G22 40S&W Full Size Black Nitride/SS Threaded match grade barrel Build Kit comes with everything you need Except mags and ammo to complete your Polymer80 Build. This kit is not a firearms; no need for an FFL transfer. Build Kit will...

    $459.95 - $529.95
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  • SALE
    MDX Arms G26Comp 9mm Compact Build Kit with SS Barrel, jig and tools side view MDX Arms G26Comp 9mm Compact Build Kit with SS Barrel, jig and tools top view

    MDX Arms G26Comp 9mm Sub Compact Build Kit

    MDX Arms V1 G26 with Compensator in 9mm Sub--Compact P80 Build Kit  Kit Includes: V1 OEM Style CNC Serrated Slide (Available in Cerakoted Black/FDE) Archon Glock Compensator 1/2x28 Standard Size  Shadow Systems Slide Internal Parts...

    $459.95 - $467.35
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  • SALE
    MDX Arms G43 Slim 9mm Build Kit

    MDX Arms G43 Slim 9mm Build Kit

    Slimmest 9mm Build Kit in the Market! Build Kit Consist of the following parts: V1 Alpha CNC Black Nitride with front and rear serrations OEM Slide Parts Kit (Not Installed) OEM Guide Rod OEM 9mm Barrel OEM Front and Rear Sights (Not...

    Was: $499.99
    Now: $474.95
    Out of stock
  • SALE
    MDX Arms Polymer80 .22 Long Rifle Build Kits Full Size Frame 17 MDX Arms Polymer80 .22 Long Rifle Build Kits

    MDX Arms Polymer80 .22 Long Rifle Build Kits

    MDX Arms Polymer .22 Long Rifle Build Kits features Advantage Arms Complete Slide Assembly Advantage Arms .22 Long Rifle Slide  Adjustable Rear Sight Last Round Lock Open Internal Firing pin Safety Anodized per Mil-A-8625 with matte...

    Was: $499.99
    Now: $399.99
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  • SALE
    MDX Arms V1 Compact Long Slide 9mm Build Kit MDX Arms V1 Compact Long Slide 9mm Build Kit Angled View

    MDX Arms V1 Compact Long Slide 9mm Build Kit

    MDX Arms V1 G17 9mm Build Kit - G19 Compact Size Frame with Full Size G17 Slide (Compact Long Slide) Kit Includes: V1 OEM Style CNC Serrated Slide (Available in Cerakoted Black/FDE/Tungsten Gray) - Gen 3 Shadow Systems Slide Internal Parts...

    Was: $419.99
    Now: $399.99
    Out of stock
  • SALE
    MDX Arms V1 G17 9mm Build Kit

    MDX Arms V1 G17 9mm Build Kit

    Build Kit Includes: V1 OEM Style CNC Serrated Slide (Available in Cerakoted Black/FDE/Tungsten Gray/Burnt Bronze) Shadow Systems Slide Internal Parts Kit Match Grade G17 9mm Barrel OEM Glock Front and Rear Sights OEM Recoil Spring  OEM Lower...

    $399.99 - $407.39
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  • SALE
    MDX Arms V1 G19 9mm Compact Build Kit 1 MDX Arms V1 G19 9mm Compact Build Kit

    MDX Arms V1 G19 9mm Compact Build Kit

    Build Kit Includes: V1 OEM Style CNC Serrated Slide (Available in Cerakoted Black/FDE/Tungsten Gray/Burnt Bronze) Shadow Systems Slide Internal Parts Kit Match Grade G19 9mm Barrel OEM Glock Front and Rear Sights OEM Recoil Spring  OEM Lower...

    Was: $499.99
    Now: $399.99
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  • SALE
    MDX Arms V1 G26 9mm SubCompact P80 Build Kit

    MDX Arms V1 G26 9mm SubCompact P80 Build Kit

    MDX Arms V1 Bravo G26 9mm SubCompact P80 Build Kit  Kit Includes: V1 (OEM) Style CNC Slide with Rear Serrations (available in Cerakoted Black, FDE, tungsten Gray and Burnt Bronze) Shadow Systems Internal Parts Match Grade G26 9mm Barrel OEM...

    Was: $499.00
    Now: $399.99
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  • SALE
    MDX Arms V2 G26 9mm SubCompact P80 Build Kit Angle View MDX Arms V2 G26 9mm SubCompact P80 Build Kit  Side View

    MDX Arms V2 G26 9mm SubCompact P80 Build Kit

    MDX Arms V2 G26 9mm SubCompact P80 Build Kit  Kit Includes: V2 G26 CNC Slide Black Nitride - 9mm MDX Arms Slide Parts Kit Match Grade Nitride G26 9mm Barrel OEM Glock Front and Rear Sights OEM Recoil Spring  OEM LPK Polymer80 Frame...

    $445.00 - $452.40
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  • Sig Sauer P320 Caliber X Change Kit for 9mm

    Sig Sauer P320 Caliber X Change Kit for 9mm

    Sig Sauer P320 Caliber X Change Kit  This P320 completion kit includes everything to finish out your newly completed MUP-1.  The kit includes all of your lower parts kit and is interchangeable to any of the other caliber x change kits...

    $399.00 - $599.00
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