Quote Originally Posted by Airsporterman View Post
It's the improved 'S' pivot breech bolt that attracts me - I could probably make my own stock.
The barrel I have may be a 'heavier' one - I will have to check?

ASM
I know you've got a mk2 Merc so no bolt but you could widen your choice other than the more expensive 'S' you could go for a late production Mercury because I know some of those came with the breech pivot bolt too as standard.
Then you would have your .25 (hopefully heavy) barrel, you do the stock & the gun would have the pivot bolt & there you are.