There is only one.
The Knight's Armament M110 Sniper Rifle. Used by countless Allied nations military and LE Dept.
Civy version is the SR-25 with the only difference being the tan paint job, suppressor and adjustable buttstock.
We have one left in stock, found here on the website.
The new SR-25's feature the keymod rail and other improvements. In use with a number of Tier 1 SOFCOM Allied Units.
We have one of these left in stock as well. Found here on the website.