Air Rifle B1 4.5/5.5mm Caliber Air Pellet Gun .177 / .22 Wood 400-500fps Spring-Piston Break Barrel

I got this rifle in .22 caliber. Shoots around 430fps. Nice little rifle but you should really disassemble it completely, clean everything, file and/or polish the sear and where it engages at the piston, clean the barrel thoroughly, then make sure the barrel hinge is snug and all screws are snug.Do all that and this rifle is so much better and will operate smoother. Another thing I did was remove the trigger and carefully hammer it into a more shallow curve. In stock condition it was too curved and didn’t feel right, but now it’s much better after being straightened a little bit.I’m getting good shot groups at 10 yards using flat nosed RWS meisterkugeln pellets. Overall this rifle is cheap and a bit rough, but with a little work it’s not bad at all and pleasant to shoot.Update: February 15, 2025Still shooting this rifle and it’s still working fine. I did have to blue loctite the screws that hold the stock to the body to keep them from coming loose. Also the pin that holds the barrel linkage (under the barrel) was working its way out and getting loose. I had to peen it with a hammer and drift to make it stay in place. Overall still happy with this rifle for the price.