Greetings, Just recieved my handpicked m57 from sog and it looks to be never uniussued and un fired, but when i try to rack back the slide it will not go until i cock the hammer, i cleaned the gun really well removed the mag and tried racking still no only when i cock the hammer, am i doing something wrong? is this normal for this gun? Iam new to this forum, and would love some help