The FSM-S is machined from 1018 CRS Steel, Case Hardened RC 62, and is finished with Nitride Coating. It fits between the Receiver Block and Modular Stock. The FSM-S can be mounted to fold either left or right. Will add .55" to your Length of Pull and weighs 5 oz. The FSM-S is manufactured with and without the Boss. The Boss is the raised (oblong shaped) portion on the Arm (small side). The Boss works with DoubleStar's receiver blocks to add stability. If attaching directly to a reciever no boss is needed.

Specifications and Features:
Machined 1018 CRS Steel
Case Hardened RC 62
Can Fold Left or Right
Adds .55" Length of Pull
With Boss
Black Nitride Coating
5oz
Made in the USA