Description
The 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
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