The last of the spring powered Olympic match rifles included the Anschutz 380. It is recoil free , but other then the sledge type like the FWB 300 . or the Diana 54 Air King , the mechanism is internal. I have no idea how it works , but it certainly does. The trigger is light , but I haven't measured it so far , although I have the gauge. It had no rear sight on it when I found it , but my eyes could not have used them anyhow. So , it wears a Hawke Vantage 3 X 9 scope , which is fine. I love shooting it off the bench , usually at 25 yards. The JSB 7.33 is what I feed it.