TM VSR,JG BAR 10,A&K M24 and WELL L96 (Gen 3) are the best sniper rifles about. Plenty of parts available and the guns are often constructed to be easily taken apart so you can tune or upgrade to your desires. A&K M24 comes with steel trigger parts and a steel catch piston stock which means minimal upgrading. All VSR compatible. Only bad thing about these is the hop up but these take VSR 10 style units. They are often in spec too so most parts will fit. It's an often under rated sniper rifle.