Its a USFT by MAC1 airguns. .177 cal, runs ~900 fps, no regulator (and that rifle is probably pushing 100,000 rounds down range by now) operates with a 1300-1650 psi fill range and a fill will go 60-70 shots.
Tim at MAC1 also has made rifles in a similar style to this for long range airgun benchrest and hunting in .30 cal. Qualifying air for hunting pigs and deer is being worked on now, turkeys were given the go ahead a few years back.
The scope on it at the time is a 24X Leepers Accushot, Im running a 50X Nikko Sterling Diamond on it now. You can hunt flys with it at 30+_ yards.
The sport of Field Target (FT) runs targets from 10 to 55 yards with kill zones from 3/8 inch to 1-1/2 inch. 2 shots per target (reset after hit) 2 targets per lane and 12-16 lanes depending on level of match.
Open class (American) FT is limited to 20 foot pounds energy at muzzle, so you see .177,.20 and .22 cal in it. World FT has a 12 foot pound limit for the base and I think everyone in that class usually shoots .177 cal.
You can shoot it with anything, and there are classes for spring piston, hunter (16x scope max), etc... seems to be a good growth spurt going on, and this sport is EXCELLENT for training for longer range and more powerful rifles. The scale is right around 1:10 and all the ballistics and wind doping (probably my weakest sub skill at this point) are the same but ammo is profoundly cheaper.
I have a Gamo myself. Simple, efficient WTSHTF small game/keep fed tool. Pigeons and doves beware!
Very interesting. Was wondering if paint ball games had anything to do with it. Guess not! Sounds like a fun tool, though.