Flared Magwell for the Mark 15 and newer 3211 Grips.
Has been proven to fit the factory Sig, Magpul A-Mag, and Promag magazines.
Very wide mouth for faster reloads.
Comes with extended length (1.488") mainspring housing pin.
 
NOTE: Does not fit previous versions (Mark 14 and older) 3211 grips.
 
DESIGNED AND MADE IN  IDAHO