Does anyone know if this is a large or small shank?
http://www.gunpartscorp.com/catalog/...830&catid=6487

New, stainless steel, factory original barrels with 1.050" diameter threads. These 12-1/4" barrels are threaded for a 9/16" x 28 TPI adjustable muzzlebrake, which is not included. Instead, a factory thread protector has been installed, making the overall length 13-3/4". The pistol can be safely fired with the thread protector in place. Available in the following calibers. Quantities are limited. Note: Barrels should always be installed by a qualified gunsmith.


It looks like it has the large shank step up in front of the threads and it is a 300 wsm.