• STRIBOG POLYMER LOWER
  • STRIBOG POLYMER LOWER
  • STRIBOG POLYMER LOWER
  • STRIBOG POLYMER LOWER
  • STRIBOG POLYMER LOWER
  • STRIBOG POLYMER LOWER
  • STRIBOG POLYMER LOWER
  • STRIBOG POLYMER LOWER
  • STRIBOG POLYMER LOWER
  • STRIBOG POLYMER LOWER
  • STRIBOG POLYMER LOWER

    • STRIBOG POLYMER LOWER

    A3 INDUSTRIES

    $199.95
    SKU:
    REC-100-P
    Shipping:
    Calculated at Checkout
    • XENO TRIAD - REDUCED ANGLE AR-COMPATIBLE GRIP
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    Product Description

    NOTE: ONLY COMPATIBLE WITH 9MM STRIBOG'S

    A3 INDUSTRIES LOWER

    The A3 Industries lower is designed to use the popular and well established AR triggers, selectors, and grips. These AR features bring almost limitless possibilities to your Stribog platform, allowing the user to customize the Stribog to suit their individual tastes and shooting preferences.

    Additionally, this lower is designed to use the widely trusted CZ Scorpion magazine rather than the original Stribog magazine. The Scorpion magazine has a proven track record of delivering more consistent feeding and generally performs more reliably across a wider range of ammunition types and brands.
     
    NOTE: Not recommended for use with aftermarket buffer kits or short-stroke kits
    NOTE: Single-stage triggers only. 2-stage triggers will not reset properly in the Stribog
     
    Lowers ship complete with a hybrid machined aluminum/hardened steel bolt release lever, A3 Industries TRI-Lever polymer mag release, new bearing detent takedown pins, new 1/4" grip screw, and a selector detent with spring. Lower is manufactured from injection-molded Zytel polymer with 30% glass reinforcement.
     

    A3 INDUSTRIES BOLT RELEASE LEVERS:
    As of Fall 2025 every lower now ships with our upgraded machined aluminum bolt release lever. These levers are machined from 7075 aluminum and then hard coated low-gloss black. They have a hardened steel insert at the bolt interface and also feature textured thumb levers.

    MAG RELEASES:
    The lower ships with an A3 Industries Polymer TRI-Lever mag release. These are injection molded from Zytel Polymer with 30% fiber reinforcement. 
     
    BALL DETENT TAKEDOWN PINS:
    Lowers ship with new ball detent steel takedown pins, allowing the user to leave their factory lower fully intact, with no need for disassembly. 
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    MAGAZINE INFO and COMPATIBILITY:

    During the development of our lower, we evaluated multiple magazine well angles to identify the configuration that delivered the most reliable feeding across the widest range of magazines. In addition to angle, we determined that the vertical position of the magazine relative to the bolt is even more critical to proper function. The Stribog is particularly sensitive to both of these factors, which can present challenges given the variations in design and dimensions among different magazine manufacturers.

    In contrast, the Scorpion is designed with more flexibility. Its ejector sits higher, and the bolt has more clearance around the magazine. This makes the Scorpion system more forgiving, allowing it to function reliably with a wide range of magazine types—even when those magazines differ significantly in size or shape.

    BRAND/STYLE PROS CONS
    PSA 35 ROUND (#1 recommended)
    • Low price
    • High quality
    • Good fit in magwell
    • Readily available
    • None
    MAGPUL 35 ROUND
    • Low price
    • High quality
    • Good fit in magwell
    • Readily available
    • Tallest feed lips which usually requires filing to fit and function properly
    • LRBHO is temperamental in our lower due to the smaller "finger" Magpul uses on their follower.
    ETS 40 ROUND
    • Highest capacity
    • Good fit in magwell
    • Generally will not feed the last 1 or 2 rounds when used in the Stribog
    CZ FACTORY MAGS
    • Low price
    • Loose fit in magwell
    • Temperamental functionality due to various changes throughout the years. 
    MAGPUL, F5, PROMAG 50 ROUND DRUMS
    • Not compatible
    • Not compatible

    SUMMARY: THE BEST OVERALL PERFORMER IS THE PSA 35 ROUND MAGS. THESE ARE READILY AVAILABLE, INEXPENSIVE, HIGH-QUALITY, AND REQUIRE NO MODIFICATIONS.

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