This is an excellent reproduction of the Mk43/M60. It's equipped with a Wolverine Inferno hpa engine, and includes a Bingo Airsoft Designs trigger control unit. The TCU connects to the Wolverine FCU and winds the box mag with each trigger pull. The gun is stock beyond that. The hop up could do with a replacement but it seems to be a proprietary unit for the VFC. The Bullgear Mk43 aluminum hop up unit looks to be compatible, but I can't confirm that. I have the original box, so it could be shipped but it is HEAVY, so shipping costs will reflect that. Shipping costs are not included in the price. Cash or EMT. Not looking for trades at this time