Altra Forward Mass System Micro Insert Weights Weight:10gr Multiple Heat zones (Thighs

Multiple Heat zones (Thighs

Microadjustable rails let you make quick

Multipurpose – Camouflage crossbows and other tools used in the field

Sold in a 1/4 Acre jug

Altra Forward Mass System Micro Insert Weights Weight:10gr Multiple Heat zones (ThighsThe Pinnacle of Precision & Performance Altra Forward Mass System (FMS) micro insert weight system offers fine adjustment of total arrow weight to increase F. O. C. and improve down range accuracy. The micro insert weights are designed for use with all Altra 166 arrows and are stackable for infinite weight adjustment. Fitment: Altra 166 shafts Weight: 10 gr or 20 gr Quantity: 12 pk Blue Loctite recommended for assembly