This guide details the installation of the Parker Mountain Machine (PMM) Battery Control Device (BCD), a BAD Lever alternative for Sig Sauer MCX Rattler LT and Spear LT platforms. The video highlights the need for specific PMM BCD variants for these models and demonstrates a method for achieving a tighter fit using tape and a zip tie to mitigate wobble, a common issue with aftermarket bolt catch levers.
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