Ruger Mark I Thread Adapter – 1/2x28 TPI Muzzle Adapter For Bull Barrel, Black Aluminum

If you own a Ruger Mark I pistol with a bull barrel and have been wanting to attach a suppressor or other muzzle device, you’re going to need this little adapter.

It’s a brand-new, simple aluminum piece that does exactly what it’s supposed to do.

This specific adapter is made for the Ruger Mark I models with a bull barrel.

It screws on and gives you the standard 1/2x28 TPI threads that most .22 caliber accessories use.

The part number for reference is Ruger 22 PB-B only, so double-check your barrel before ordering.

It’s made from aluminum and has a clean black finish that looks good and resists wear.

It’s an unbranded part, but the machining is clean and it’s ready to go.

If you’ve been looking for a way to get those threads on your Mark I, this is the part you need.