G&G Combat Machine CM16 Predator AEG Lasers This gun is great if

This gun is great if you are looking for a M4 with a longer barrel and rail system

20g BBs with this

The Madbull Accelerator VSR-10 Hop Up Bucking that also fits the M28 and other VSR-10 compatible rifles

not the standard 'pro'

G&G Combat Machine CM16 Predator AEG Lasers This gun is great ifThe G&G CM16 Predator AEG is an awesome M4 style airsoft gun straight out of the box! Coming with G&G's ETU MOSFET from the factory, this gun is the bee's knees! Gun also features a polymer body and a sweet metal keymod rail system. This is the combat machine version which is a polymer version of the GC16. Very nice bang for the buck airsoft gun! Length: 721mm Inner Barrel: ~260mm Muzzle Velocity: 350~370 FPS Note: Does not include battery or charger