I have a .22 cal bam xs-28, its all stock and i love it.. i dont think it needs the trigger job at all, thats the best thing about the rifle. i have shot about 300 pellets and its just getting better and better. You have to make sure all the screws are tight because they will work free. I have not had any seal problems, but i would like to polish the piston, but after reading i am not goiing to attempt it, i like it just the way it is...
after saying all that, i am not using it much at all these days and i am thinking of investing a hand gun, i might be convinced to sell it if the offer was right its in new condition. i paid 330 delivered to my house...