i'll get strait to it, i have an all metal HFC beretta m190 GBB. i bought it off of a guy on craigs list a few months back, came with one extra mag. but the extra mag had a broken gas valve, the one where you put the green gas in. so i finally got around to ordering a new one just recently, and i go to put it in, and there is something loose in the gas chamber. tried to get it out with tweezers, shook it a lot. now the thing does not rattle in there anymore, didnt see anything fall out, what should i do? ?