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SIG MPX/MCX/RATTLER

Braces and stocks, fore-grips, and more for the popular SIG MPX, MCX, and Rattler.

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  • STEADY-BRACE - Pistol Stabilizing Brace STEADY-BRACE - Pistol Stabilizing Brace

    A3 TACTICAL

    STEADY-BRACE - Pistol Stabilizing Brace

    Introducing the Steady-Brace Modular Pistol Stabilizer. The SteadyBrace provides pistol stabilization in a sleek and sturdy platform at an affordable price point. Designed from the ground up to work with our professional line of Modular Folders, you can...
    $49.95 - $79.95
  • MODULAR FOLDING BRACE - PICATINNY MOUNT (1913) MODULAR FOLDING BRACE - PICATINNY MOUNT (1913)

    A3 TACTICAL

    MODULAR FOLDING BRACE - PICATINNY MOUNT (1913)

    Modular design for individual customization Positive latch in both folded and closed positions Folds left or right by simply flipping the hinge (except Sig applications) HD steel leverage hinge with quick-deployment These Picatinny-mounted (1913) A3...
    $229.95 - $339.95
  • MODULAR VERTICAL FOREGRIP W/INTEGRATED HAND-STOP - COMPACT MODULAR VERTICAL FOREGRIP W/INTEGRATED HAND-STOP - COMPACT

    A3 TACTICAL

    MODULAR VERTICAL FOREGRIP W/INTEGRATED HAND-STOP - COMPACT

    IDEAL FOR K model firearms such as MPX-K or Scorpion Micros! A3 Tactical’s Compact Shorty Vertical Grip is the perfect foregrip for limited-space rails. The unique integration of forward Hand-stop and Vertical Foregrip in such a short combo opens...
    $0.00 - $89.95
  • MODULAR FOLDING STOCKS - PICATINNY (1913) MOUNT MODULAR FOLDING STOCKS - PICATINNY (1913) MOUNT

    A3 TACTICAL

    MODULAR FOLDING STOCKS - PICATINNY (1913) MOUNT

     -NOTE: NOT COMPATIBLE WITH KELTEC P50 DUE TO CHARGING HANDLE INTERFERENCE. THE P50 REQUIRES THE OFFSET SIG HINGE AND CAN BE PURCHASED HERE. PICATINNY (1913) MOUNT - HD steel Leverage style hinge with our APEX interface 12 DIFFERENT EXTENSIONS FOR...
    $229.95 - $269.95
  • TRIANGLE STOCK TRIANGLE STOCK

    A3 TACTICAL

    TRIANGLE STOCK

    Choice of machined aluminum body or Super rigid Zytel polymer 2 Quick-disconnect (QD) sling mounts at front of stock  Rear textured butt-plate APEX Heavy-duty steel tensioned hinge positively latches in open position with quick-deployment from...
    $99.95 - $199.95
  • BUTTPLATES FOR MODULAR STOCKS BUTTPLATES FOR MODULAR STOCKS

    A3 TACTICAL

    BUTTPLATES FOR MODULAR STOCKS

    If you are looking for a butt-plate to fit our Modular extensions, we now have 5 different options available. All butt-plates are machined from 6061 aluminum. MADE in USA. Below are lengths to help you determine overall length of your stock. The length...
    $49.95 - $89.95
  • MODULAR FOLDING BRACE - SIG MPX/MCX/RATTLER MODULAR FOLDING BRACE - SIG MPX/MCX/RATTLER

    A3 TACTICAL

    MODULAR FOLDING BRACE - SIG MPX/MCX/RATTLER

    Modular design for individual personalization PICATINNY (1913) MOUNT - HD steel Leverage style hinge with our APEX interface MPX - Uses our 7.75" extension for a 13-3/8" Length-of-pull (LOP) MCX/Rattler - Uses our 7.75" extension for a 13-3/16"...
    $229.95 - $339.95
  • INDIVIDUAL STOCK/BRACE EXTENSIONS

    A3 TACTICAL

    INDIVIDUAL STOCK/BRACE EXTENSIONS

    If you want to purchase a different length extension to shorten or lengthen your A3 Tactical Modular brace, we have 5 different lengths available in both straight and offset extensions. The extension lengths are actual length from end-to-end.  These...
    $69.95
  • MINI - MODULAR VERTICAL FOREGRIP MINI - MODULAR VERTICAL FOREGRIP

    A3 TACTICAL

    MINI - MODULAR VERTICAL FOREGRIP

    These Vertical Foregrips are perfect for applications with limited rail space. The two-piece design allows 5 different grip choices and they are available in both Picatinny or M-LOK mounting patterns. Machined from 6061 aluminum and anodized in...
    $0.00 - $69.95
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