Cyma CM510 M4 Carbine Replica in Blue 0 3 25 Nov 2021 13:50 BB Guns UK Cyma CM510 M4 Carbine Replica in Blue Key Features:- Polymer Build- Adjustable hop-up system- Upper receiver with 20mm top rail- 300 Rounds magazine- Metal Gearbox Perfect airsoft gun for beg..Price: £99.95