Uzi Stock Adapter Type 2 # SA-UZI-02 Uzi Stock Adapter Type 2 (SA-UZI-02) $50 Installation Instructions 1. Remove factory stock . 2. Bolt adapter to receiver using factory bolt. 3. For use with Sig MCX/MPX stocks and braces which mount to picatinny rails. 4. Vertical adjustment for iron sights or optics.