I saw a custom built Mauser the other day and don't know what it is. Has anybody saw one that the rear of the bolt was enclosed? On a normal Mauser the end of the bolt is open where you can look at the firing pin housing and see if the gun is cocked or not. This one was capped and you could not see anything except the cap and outside of the bolt. The gun looked to have the factory barrel in 30-06 caliber. Anybody know of a Mauser like this?