Buyairsoft is under new management. CAS bought them out.
Their customer service should be better now that they're under new management.
As for your question. The barrel length does make a difference to some extent but TBH not much. You should consider your body type and size first before picking a gun variant. I was told that hopup unit and rubber quality is more important in accuracy than barrel length (barrel length does play a part in it however but only to an extent).
eg. Will you be able to comfortably field an M16 (are you a big guy with a football player build?) or will you be better off with an M4 carbine (are you a smaller guy who's skinnier?).
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE