Well Massi's NATO SF/ Russian Weapons
addon has an SR25, and it's one of the best DMR rifles I've seen in ArmA 3 yet, it comes in all camos (black, wood, desert) and there are other addons already for new scopes or the bipod deploying. Here you go:
FHQ Accessories pack
VTS Simple weapon resting
Make sure you copy the extra files in FHQ accesories pack so they work with all the mas weapons.
About the recoil, you can use this small mod:
Massi's pack has way more marksman rifles like the SVD or M14, and also other .50cal snipers.