Takes a 18rnd short mag (mag included) and you CAN get spare ones. There were 2 short 20mm rails on either sie of the receiver which are now not there but they were cosmetic only. No affect on the operation. Has a long rail on the top receiver.
Boxed, V Good Cond, works perfectly, never used in a skirmish, price wise open to offers on this but offer must include your choice of postage cost, swap wise most things m4 related, but if you had a gas pistol that you wanted to swap i may consider it, also usual checks will be made.