On the right side of the receiver, there is a marking that says "ASGK" That marking is for airsoft guns, not real guns.
http://www.floridaairsoft.com/forums/messages.php?topicID=941&topicname=asgk,%20what%20is%20it
Admin
2014-05-11 23:51:38
Thank you, we will check it!
unlimited access user
2014-05-14 07:43:05
Please..give out 9mm full auto version, not .22lr toy gun version that sucks.