Competition series by Umarex. Brand new Tightbore barrel and threaded outer barrel. Metal tooth piston. Upgraded picatinny railed bottom hand guard. Wired to deans. Comes with 1 metal hi cap mag and 1 plastic mid cap. I have attachments available. Never even fired by me, I bought it for my girlfriend to get into the sport since I thought it was lightweight polymer, but this is so sturdy, it's too heavy for her. My loss your gain. Price is shipped. Willing to look at all trades, especially looking for mp5k and skull frog parts.