Shooter’s Box Rifled Drop-In Caliber Adapter 12ga to 357 MAG / 38 SPL

This adapter gives your 12ga single or double shot break open shotgun the ability to fire 357 Magnum and 38 Special ammunition.

This adapter is precision machined from high quality stainless steel to the OD specifications of  a 2 3/4 12GA shell.

It will easily fit into your break open shotgun barrel and accept any 357 Magnum and 38 Special ammunition.

After firing simply remove the adapter and tip upside down to remove the spent shell.  A smooth bore is gently bored through the adapter for the bullet (no rifling).

The bullet side is precision CNC machined to the exact chamber dimensions to accept 357 Magnum and 38 Special ammunition (SAAMI chamber specifications).

Will fit any break open shotgun with 2 3/4″ or 3″ chambers.

Not recommended for pump action or semi-auto shotguns.  Designed for use with break open style shotguns.