EVANIX AIRSPEED 480 .25 CAL- Is a light weight semi auto rifle that is a blast to shoot. If you are looking for a pinker of a varmint gun this would be on the top of my list for sure. You will get more shots with the 480cc carbon fiber tank that is filled from a foster fitting so no fill probe needed. You also get extra breech rings and two 9 shot metal mags. The barrel is threaded if you are looking to add a moderator it will accept 1/2unf moderators. This has one of the most reliable semi auto actions on the market.