I got the rig, & it seems to be a blend of MK1 & MK2 features.
For example, the action has the scalloped top corners of the MK2, but the straight cut mag slot & small cocking wear plate (held in with a single screw) of the Mk1.
I still need to determine if it has a reg, or if that's just a bottle connector between action & bottle.
Seems to have the Anschutz trigger, with a single pin thru the action / receiver & 1 allen screw holding it in, along with the safety on the upper right side of the action / stock.
Trigger is very nice, even after recently spoiling my trigger finger with a couple thousand pellets using a brace of Daystate mouse-click electronic triggers.
After picking it up for a little more than the price of some tuned Mrods I've seen sell recently, I'm happy, even if it turns out it's not regged.
20cal H&N 13.58gr pellets at an avg of 963 fps is 29 ft lbs...& Loud, so I haven't been able to shoot it much, yet.
Many thanks to all who have posted & contacted me to educate me on Rapids & their variants...(especially you, Scott) http://s209.photobucket.com/user/SoTxShooter/library/Beeman%20Super%2012%20Mk2%20Theoben%20Rapid%2020%20cal?sort=3&page=1
Long ago I posted I liked the look of John Darlings little Rapid 7, & here we are, a while later, & I now have a relative of the little Rapid 7.