[johan_saint]

Originally Posted by Stealthee

Does anyone know if G&P rails will fit on the WE M4?

These are the rails I'm looking to get: G&P RAS II Long Version ( Handguard Kit )

Should can, if can not, you maybe need to custom the ring. I just built a M4 noveske using the M4 cqb 4th gen, the inner barrel connector is diffrent with other m4 gen, its more thin, so no need to custom the adaptor.