For sale is a an MCX rattler upper assembly conversion kit, .300 BO, with 5.5" barrel. It includes everything required to convert an AR lower to use the MCX upper- Rattler upper half, MCX match duo trigger, receiver adapter, and AR stock folding adapter. Approximately 350 rounds fired. Runs great suppressed and unsuppressed. The railed stock interface on the receiver adapter has some marks from where the stock adapter was loose. Otherwise excellent condition. Surefire Warcomp insalled. Includes 3x magpul .300 blackout magazines where legal.
$1700
Thanks
$1700
Thanks
Last edited: