Not a great fan of the air arms s300/400 series, always found the bolts awkward to use but then again I am a bit used to the rapid bolts, also not keen on the kalibrgun crickets even though at one point I had 2 of them and still have a .177 left ( if any one fancies a deal on a .177 or .20 ttr let me know) like the bullpups idea just think the cocking lever is in the wrong place, have got a skan mk2 that is spot on though