thats a possiblility, or there could be a leak, another problem is that the mag may not be well kept not saying you don't treat you guns well. other than that i'm not to sure i'm not the greatest with gas guns. also soft air depot could also be the reason they seem to overprice and do cheap jobs. no offense to anyone who likes them. but from what i've seen most of their stuff they do is POS, and they do really cheap jobs to the guns.