I received my free XS-B16 yesterday. I like it's look. Yep, the barrel had to be cleaned. Mine is the .22 version. I agree with you about the trigger. It's not bad. The first stage (?) feels a bit loosey-goosey, but there is a definite firming up when the second stage (?) is reached. Of course it's non-adjustable. But it's not a heavy pull. I had not thought to check the screws. I've been running a few RWS 14.5gr superpoints through it, and the accuracy was fine, initially; one ragged hole of about 1/2 inch with 10 shots at 9 yards. Then the grouping started walking about. I had other stuff to do, but I'll get back to it later. I liked the finish of the metal on the receiver too. Oh. I did take a few random shots outside. It's a very quiet rifle. Given it's low power, that's welcome, if surprising. I'm guessing a few more FPS could be squeezed from it by shimming the breech seal, but for a child I guess it's powerful enough. I plan to give this to my great nephew, if his mom approves. When I showed it to the wife, she actually liked it and said she might want this little rifle! It would behoove me to let her have it too!
thanks to Mike, but sorry he had to come to this. Next time I'll advise him to donate them to the Scouts, or some other youth organization.