No way Jose. I took that sucker right to the range on Saturday and put 120 rds through it. Functioned perfectly and made a nice little ragged hole. However, the main reason that I took off the wooden stock was because when I rapid fired the entire 40 rd. mag I thought the fore piece was going to catch fire. It smoldered for a good 3 minutes. LOL!
I just picked this up on Saturday so only one trip to the range so far. It came with 4 X 20 rd. mags and a 40 rd. mag. I only tried the 40 rounder once, but I fired all 40 as fast as I could. no problem. Still I tend not to trust really high count mags.