Texoma Custom AEA Defender 68 caliber CNC Aluminum insert

We are selling an AEA Defender custom 68 caliber insert (No gun or barrels). This insert allows you to shoot 68 caliber projectiles, you just insert the projectile and an air cartridge (No barrel or pellet). However, you can leave it installed and insert 9mm/357 barrels or 410ga barrels without removing the 68 caliber insert.