FSM Standard Folding Mechanism W/Boss
$58.99
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FSM Standard Folding Mechanism W/Boss
The FSM (Folding Stock Mechanism). It fits between the Receiver Block and a Modular Stock. The FSM can be mounted to fold either left or right and will add .75" to your Length of pull. The FSM is manufactured with and without the Boss. The Boss is the raised (oblong shaped) portion on the Arm (small side).
Weight: 3.5oz
Hardware included
