Internally, the VFC AKS-74U boasts the same level of quality when it comes to internal components and structure. Featuring a CNC-machined steel bolt carrier, simulated bolt, and long-stroke piston assembly. The bolt carrier group is built to be incredibly tough, durable, and robust. Its cylinder assembly has been beefed up with an enlarged 22mm cylinder, which naturally results in a much stronger kick and recoil impulse compared to other brands of GBB AKs on the market. The gun also features an adjustable bolt travel setting, which allows the bolt to travel fully to the rear like a real AK system or a short-stroke half-travel bolt position, which only allows the bolt to travel half the distance when gunning for a faster rate of fire. Next, the fire control group is also a full steel construction for additional durability and robustness, and is equipped with a realistic braided wire hammer spring, like seen in a real AK FCG. The AKS74U also comes equipped with a fully adjustable hop-up unit that has an easy-to-disassemble design. The hop-up bucking and inner barrel are all using the standard VSR-Spec pattern, making it very easy to upgrade with already available aftermarket buckings and inner barrels.

The VFC AVS-74U comes paired with VFC's new Plum colored 5.45x39-style AK gas magazine, with the rifle being fully compatible with VFC's other Black AK74M gas magazine. The outer shell of the magazine is made using the same fiberglass polymer used for the pistol grip, while the core of the magazine is machined using lightweight aluminum alloy, making the overall magazine unit extremely lightweight. It is able to hold 42 rounds of 6mm BBs and boasts a massive 107cc gas capacity, which is the largest compared to other brands of AK gas magazines on the market to date! The magazine also comes equipped with a dry fire mode, which allows the shooter to experience shooting the gun safely without ammo.