Originally Posted by Skruface
Gas sniper rifles require no upper body strength to cock the bolt. A high-tensioned spring is often quite difficult to cock; you almost certainly lose your sight picture as you have to really work to cock the bolt. With a gas sniper rifle (like my Tanaka M700 AICS) you don't even have to move the rifle to re-cock the bolt - keep your eyes looking through the scope and flick your wrist.
Most spring sniper rifles are neither particularly accurate or consistent right out of the box without a couple of hundred dollar in tuning and modifications (tightbore, Zero Trigger or sear set). The same can be said for *quality* gas sniper rifles. Add a few parts and they can become very consistent.
There's a great thread here about Illusion's experiments with upgrading his gas-powered Tanaka:
I actually find gas bolts harder to work than spring bolts... With spring bolts it's the same push and pull every time.. but with gas bolts there's all sorts of variable pushes and pulls depending at what part of the bolt you're at...
Atleast it's that way with Mr. Jon's Star AWM