It's a Beeman branded Daystate LR90. Miniature Huntsman . Very solid and simple rifles. Original seals were Buna and only good for around 7 years or so but fairly simple to reseal. I had a 177 long and a 22 carbine. I traded the 177 in on a Huntsman that I still have but really wouldn't mind having the LR instead. My wife used the 22 for FT in the early years and we hunted squirrels a little with it. Not a lot of shots, depending on power tune but very accurate and not exceedingly difficult to tune. David Slade used one with a Target stock to good effect in the late 90s - early 2000s and probably is a good souce of info.
Not sure what else to say except very enjoyable rifles.
I see most users of this thread are still active, I have a question. I have inherited a Beeman Mako and it has a hole for a fill probe , this must have been added in the past? I cannot figure out what fill probe to use with it would anyone have a suggestion? Can I just measure the I.D. of the fill probe port and get as close as possible ( oring making up the difference ) and make sure there is an oring on each end of port?