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Learn how the MDX Arms Mystery Box works. Limited-release tactical gear drop featuring $300+ guaranteed value in brand-new performance components.

Shop by Category

  • CA APPROVED
  • CLEARANCE
    • All Clearance Items
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    • Optics
  • DEALS
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    • HANDGUN PARTS
    • RIFLE PARTS
    • OPTICS
  • PISTOL PARTS
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    • BARRELS
    • SLIDE PARTS
    • FRAME PARTS
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      • .223/556 RIFLE
      • .223/5.56 Pistol
    • CA COMPLIANT PARTS
      • Featureless AR Parts
      • Magazine Lock Type
    • UPPER PARTS
      • BCG & BCG Parts
      • Charging Handles
      • Upper Receivers
      • Forearms
      • Forearm Accessories
      • Gas Blocks & Gas Tubes
      • Muzzle Devices
      • Replacement Upper Parts
      • Vertical & Angled Grips
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      • REPLACEMENT LOWER PARTS
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    • STOPBOX USa
    Smoke Composite Carbon Fiber parts and accessories
    HOLOSUN Brand of Red Dots
    • STRIPPED SLIDES
      STRIPPED SLIDES
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      COMPLETE SLIDES
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      OPTIC SLIDE COMBO

    Featured Products

    • SALE
      CLOSE OUT* MDX Arms G19 V1 JJB/TIF Complete Slide CLOSE OUT* MDX Arms G19 V1 JJB/TIF Complete Slide
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      *CLEARANCE* MDX Arms G19 V1 JJB/TIF Complete Slide

      MSRP: $300.00
      Was: $250.00
      Now: $150.00
      Choose Options
    • SALE
      STOPBOX Pro BUNDLE STOPBOX Pro BUNDLE
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      STOPBOX PRO Bundle - BOGO

      MSRP:
      Was: $372.00
      Now: $149.99
      Choose Options
    • SALE
      Magpul Gen M2 MOE 223 Rem/556NATO 10/30 Rounds Fits AR Rifles in Black Magpul Gen M2 MOE 223 Rem/556NATO 10/30 Rounds Fits AR Rifles in Black
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      Magpul Gen M2 MOE 223 Rem/556NATO 10/30 Rounds Fits AR Rifles in Black

      MSRP:
      Was: $18.95
      Now: $15.99
      Add to Cart
    • SALE
      MDX Arms SIG P320 Slide Completion Kit MDX Arms SIG P320 Slide Completion Kit
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      MDX Arms SIG P320 Slide Completion Kit

      MSRP:
      Was: $129.99
      Now: $69.99
      Add to Cart
    • SALE
      MDX Arms SIG P320 Lower Parts Kit | Upgraded FCU Components MDX Arms SIG P320 Lower Parts Kit | Upgraded FCU Components
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      MDX Arms SIG P320 Lower Parts Kit | Upgraded FCU Components

      MSRP:
      Was: $129.99
      Now: $89.99
      Add to Cart
    • SALE
      MDX Arms Sig P365 9mm Slide Completion Kit MDX Arms Sig P365 9mm Slide Completion Kit
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      MDX Arms Sig P365 9mm Slide Completion Kit

      MSRP:
      Was: $69.99
      Now: $54.99
      Add to Cart
    • SALE
      Rise Armament RA-140 Super Sport Single Stage - Flat with LFOD Engraving Rise Armament RA-140 Super Sport Single Stage - Flat with LFOD Engraving
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      Rise Armament RA-140 Super Sport Single Stage - Flat with CTI Engraving

      MSRP:
      Was: $159.99
      Now: $124.99
      Add to Cart
    • SALE
      Rise Armament RA-140 Super Sport Single Stage - Flat with LFOD Engraving Rise Armament RA-140 Super Sport Single Stage - Flat with LFOD Engraving
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      Rise Armament RA-140 Super Sport Single Stage - Flat with LFOD Engraving

      MSRP:
      Was: $159.99
      Now: $124.99
      Add to Cart
    • SALE
      Rise Armament RA-140 Super Sport Single Stage - Curve with LFOD Engraving Rise Armament RA-140 Super Sport Single Stage - Curve with LFOD Engraving
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      Rise Armament RA-140 Super Sport Single Stage - Curve with LFOD Engraving

      MSRP:
      Was: $159.99
      Now: $124.99
      Add to Cart
    • SALE
      Rise Armament RA-140 Super Sport Single Stage - Curve with JOD Engraving Rise Armament RA-140 Super Sport Single Stage - Curve with JOD Engraving
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      Rise Armament RA-140 Super Sport Single Stage - Curve with JOD Engraving

      MSRP:
      Was: $159.99
      Now: $124.99
      Add to Cart
    • SALE
      Rise Armament RA-100 Two Stage Trigger - Flat Rise Armament RA-100 Two Stage Trigger - Flat
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      Rise Armament RA-100 Two Stage Trigger - Flat

      MSRP:
      Was: $109.99
      Now: $99.99
      Add to Cart
    • SALE
      KynSHOT Hydraulic Guide Rod for Glock G19 KynSHOT Hydraulic Guide Rod for Glock G19
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      KynSHOT Hydraulic Guide Rod for Glock G19

      MSRP:
      Was: $115.99
      Now: $109.99
      Out of stock

    Current Top Sellers

    • SALE
      MDX Arms G19 V1 Complete Slides MDX Arms G19 V1 Complete Slides
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      MDX Arms G19 V1 Complete Slides

      MSRP: $300.00
      Was: $250.00
      Now: $195.00
      Choose Options
    • SALE
      MDX Arms G19 Threaded Barrel - Black Nitride MDX Arms G19 Threaded Barrel - Black Nitride
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      MDX Arms G19 Threaded Barrel - Black Nitride

      MSRP:
      Was: $69.99
      Now: $59.99
      Add to Cart
    • SALE
      MDX Arms G26 V1 Complete Slides MDX Arms G26 V1 Complete Slides
      Quick view Details

      MDX Arms G26 V1 Complete Slide

      MSRP: $300.00
      Was: $250.00
      Now: $195.00
      Choose Options
    • SALE
      MDX Arms G19 V2 Chamfered with RMR Cut Complete Slide MDX Arms G19 V2 Chamfered with RMR Cut Complete Slide
      Quick view Details

      MDX Arms G19 V2 Chamfered with RMR Cut Complete Slide

      MSRP: $350.00
      Was: $280.00
      Now: $205.00
      Choose Options
    • SALE
      MDX Arms G19 Combat with RMR Cut Complete Slide MDX Arms G19 Combat with RMR Cut Complete Slide
      Quick view Details

      MDX Arms G19 Combat with RMR Cut Complete Slide

      MSRP: $350.00
      Was: $330.00
      Now: $230.00
      Choose Options
    • SALE
      MDX Arms G19 LF with RMR Cut Complete Slide MDX Arms G19 LF with RMR Cut Complete Slide
      Quick view Details

      MDX Arms G19 LF with RMR Cut Complete Slide

      MSRP: $400.00
      Was: $350.00
      Now: $220.00
      Choose Options
    • SALE
      MDX Arms G17 Threaded Barrel - Black Nitride MDX Arms G17 Threaded Barrel - Black Nitride
      Quick view Details

      MDX Arms G17 Threaded Barrel - Black Nitride

      MSRP:
      Was: $84.99
      Now: $59.99
      Add to Cart
    • SALE
      MDX Arms G17 V1 Complete Slide for Glock 17 Gen 1-3 MDX Arms G17 V1 Complete Slide for Glock 17 Gen 1-3
      Quick view Details

      MDX Arms G17 V1 Complete Slide

      MSRP: $300.00
      Was: $250.00
      Now: $195.00
      Choose Options
    • SALE
      MDX Arms G26 V1 Complete Slides | Glock 26 Gen 1–3 Compatible MDX Arms G26 V1 Complete Slides | Glock 26 Gen 1–3 Compatible
      Quick view Details

      MDX Arms G26 V2 Chamfered with RMR Cut Complete Slide

      MSRP: $350.00
      Was: $280.00
      Now: $205.00
      Choose Options
    • SALE
      MDX Arms G17 V2 Chamfered with RMR Cut Complete Slide MDX Arms G17 V2 Chamfered with RMR Cut Complete Slide
      Quick view Details

      MDX Arms G17 V2 Chamfered with RMR Cut Complete Slide

      MSRP: $350.00
      Was: $280.00
      Now: $205.00
      Choose Options
    • SALE
      MDX Arms Lower Parts Kit for G43 MDX Arms Lower Parts Kit for G43
      Quick view Details

      MDX Arms Lower Parts Kit for G43

      MSRP:
      Was: $85.00
      Now: $54.99
      Add to Cart
    • SALE
      MDX Arms G19 LF RMR Cut Complete Slide for Glock 19 Gen 1-3 MDX Arms G19 LF RMR Cut Complete Slide for Glock 19 Gen 1-3
      Quick view Details

      MDX Arms G26 LF with RMR Cut Complete Slide

      MSRP: $400.00
      Was: $350.00
      Now: $220.00
      Choose Options

    New Products

    • Glock OEM Locking Block Gen3 3 Pin 26/27/33 Glock OEM Locking Block Gen3 3 Pin 26/27/33
      Quick view Details

      Glock OEM Locking Block Gen3 3 Pin 26/27/33

      MSRP:
      Now: $32.00
      Out of stock
    • Glock OEM Locking Block 3 Pin G19/G23/G32/G38 Glock OEM Locking Block 3 Pin G19/G23/G32/G38
      Quick view Details

      Glock OEM Locking Block 3 Pin G19/G23/G32/G38

      MSRP:
      Now: $32.00
      Add to Cart
    • Glock OEM Locking Block 3 Pin G17 Glock OEM Locking Block 3 Pin G17
      Quick view Details

      Glock OEM Locking Block 3 Pin G17

      MSRP:
      Now: $32.00
      Add to Cart
    • MAGPUL EHG RG9 Grip RXM Full Size MAGPUL EHG RG9 Grip RXM Full Size
      Quick view Details

      MAGPUL EHG RG9 Grip RXM Full Size

      MSRP: $39.95
      Now: $37.95
      Choose Options
    • MAGPUL EHG RG9 Grip RXM Sub Compact MAGPUL EHG RG9 Grip RXM Sub Compact
      Quick view Details

      MAGPUL EHG RG9 Grip RXM Sub Compact

      MSRP: $39.95
      Now: $37.95
      Choose Options
    • MYSTERY BOX Volume 1 MYSTERY BOX Volume 1
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      MYSTERY BOX Volume 1

      MSRP:
      Now: $209.00
      Add to Cart
    • Trijicon RMR HD LED 55 MOA / 1 MOA Adjustable Red Dot Sight Trijicon RMR HD LED 55 MOA / 1 MOA Adjustable Red Dot Sight
      Quick view Details

      Trijicon RMR HD LED 55 MOA / 1 MOA Adjustable Red Dot Sight

      MSRP: $1,019.00
      Now: $774.00
      Add to Cart
    • Trijicon RMR HD LED Adjustable 55/3.25 MOA Red Dot Trijicon RMR HD LED Adjustable 55/3.25 MOA Red Dot
      Quick view Details

      Trijicon RMR HD LED 55 MOA / 3.25 MOA Adjustable Red Dot Sight

      MSRP: $1,019.00
      Now: $774.00
      Add to Cart
    • Spyderco Ladybug 3 Folding Knife – Compact EDC Spyderco Ladybug 3 Folding Knife – Compact EDC
      Quick view Details

      Spyderco Ladybug 3 Folding Knife – Compact EDC

      MSRP:
      Now: $52.50
      Add to Cart
    • Spyderco Manbug Spyderco Manbug
      Quick view Details

      Spyderco Manbug Folding Knife – Compact EDC

      MSRP:
      Now: $64.50
      Add to Cart
    • Spyderco Delica 4 Lightweight Combination Edge Spyderco Delica 4 Lightweight Combination Edge
      Quick view Details

      Spyderco Delica 4 Lightweight Combination Edge

      MSRP:
      Now: $111.75
      Add to Cart
    • SALE
      Spyderco Bodacious Carbon Fiber CPM S90V Sprint Run Spyderco Bodacious Carbon Fiber CPM S90V Sprint Run
      Quick view Details

      Spyderco Bodacious Carbon Fiber CPM S90V Sprint Run

      MSRP:
      Was: $337.50
      Now: $289.99
      Add to Cart
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