Im new to airsoft and im looking for a cwb m4 that would also be suitable for field matches. I've been looking at the KWA M4 CQR MOD 2 or the G&G GR15 Raider CQB-R Electric Blow Back AEG. What i dont like about the KWA is that it doesnt have rails other than the top one. What i dont like about the Raider is the fact that the front sight is attatched to the barrel and i think it might be a bit cheap in quality. If anyone knows a rail system that could work with the KWA please leave a link.