Well, the bolt block prevents the twisting of the bolt which in turn keeps it from turning into a ramp and being pushed down allowing throw by. It will also compensate for a worn or too large bolt window. It gives the action the most solid lock up that you can get. Since they are a zero tolerance fit (which bolt windows aren't), every SA will benefit. It is also a necessary item for fanning ( which means it protects the bolt).
The stop actually stops the cycle. Otherwise, the cycle stops because the hand is being forced against the cylinder ratchet as you thumb the hammer back ( the bolt has already locked the cylinder.). This saves wear on the hand, ratchet, cyl. locking notch, and the bolt head. These two items are why my service is a lifetime service. Every SA should be equipped with them.
These guns come with "tuned" actions but it is really after mrkt. springs. When I got my El Patron Comp. I took out the wires and put in a combo spring (tuned of course). The wires take away a lot of "feel" to me and aren't as tunable as the flat springs. A bolt block fitted and an action stop installed and the result is a smoother , lighter ,more crisp, "bulletproof" action.
Mike
www.goonsgunworks.com
