Explosive Enterprises talks about upgrading the performance of VFC AR gas blowback rifles. He covers topics that include swapping the original VFC AR nozzle for an APFG MCX nozzle and a step-by-step installation guide. He also recommends using a 4UAD (Quad) hop unit with a specific bucking, and presents a recommended upgrade path that includes the MCX nozzle, 4UAD hop unit, Unicorn barrel, a 3oz carbine buffer, and a steel barrel and bolt carrier. Also discussed is whether the VFC AR is still a worthwhile investment given the cost of these upgrades and the availability of newer alternatives.