Kakasi Tactical built a Geissele MK4 FBI HRT GBB Rifle that has the VFC M4A1 2015 DX version. It should help put a good impression of the FBI HRT which we actually dig their loadout. If you want the list of parts and accessories he used, here they are:
BigCroc compares the Spiritus System MK4 and the replica from Emerson Gear to find out if there are differences... "Quick comparison between the real deal and Emerson replica. Its' up to you to decide whether it's worth it, but do support the real thing if you have the budget!"
