Since Savage uses a removable liner it may be in Knights best interest to NOT go there. It is the same vent liner he sells for use in the Savage.
If you get my drift..
QUAKE
These liners are really that good. In a low blowby breach plug using subs i cant imagine the amount of shooting it would take to wear it out. Ive shot a lot of 45cal high pressure sub loads through mine and no erosion yet. Over 100 max BH209 loads in my 54cal with bullets from 300-385gr and they are still like new.