Atlas - Accuracy International Spigot Modular Oversize Expander Balls are designed

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

It also lubricates and protects your firearm by forming a film that protects against rust

Don’t worry

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

This allows you to develop literally tons of pressure without the usual concern about press frame deflection or misalignment

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