I've been testing in evaluating the Stoeger XM1 Ranger in .22. It has everything and more that I want. The barrel is free floating. It has a Picatinny rail under the forestock for bipod. It is regulated in the regulator and hammer spring are adjustable. It has separate pressure gauges for the generous air tank and the regulator. It has an externally adjustable cheekpiece and you can adjust the pull of the buttstock as well. The two stage trigger is adjustable. I found it extremely comfortable to shoot, extremely accurate and extremely consistent in terms of velocity from shot to shot. The Ranger version is the one with the longer barrel and the Scout version has more of a carbine size barrel for easy maneuvering in the field. It has a 1/2 UNF adapter for a moderator. Please see the link I'm attaching here for many more details. Please see the link I'm attaching here for many more details. https://intl.stoegerairguns.com/stoeger-airguns-xm1-ranger/