Atlas - Accuracy International Spigot Modular Oversize Expander Balls are designed

Oversize Expander Balls are designed to replace the standard Expander on Forster Sizing dies

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except the strengthened inner legs which are made from 7075-T6 aluminum that are Mil-Spec Type III hard coat anodized and have heat treated

Accepts all 7/8″-14 threaded dies

Screw in special "Pilots" are needed to anneal cartridges in the Annealing Made Perfect machine

Atlas - Accuracy International Spigot Modular Oversize Expander Balls are designedThe Atlas Accuracy International Spigot (AAIS) Part number BT19 Is designed for use with the BT10 NC Atlas Bipod that mounts directly to the AAIS which plugs into the Accuracy International AI AICS stocks utilizing the factory retention release mechanism. The AAIS is constructed from 6061T6 Aluminum with a type II hard coat anodize mated with an alloy steel Spigot that is finished with a Manganese Phosphate. **Important** When installing the BT 19