Here's another in Airsoft GI's FMG4 Next Generation Series... "This is the FMG4-A1 13in Spec V Gen. Carbine which means it comes with a VTAC 13in rail for airsoft. This rail system adds even more versatility to the FMG4, and it doesn't look half bad either. Only Airsoft GI can offer you such an amazing full metal gun and save you so much money in the process."