G&G TR16 MBR 556WH G2 M4 MLOK CarbineThe TR16 MBR 556WH G2 M4 is another great addition to G&G's line of premium airsoft guns that are in the market. This model has a receiver and M-Lok rail system constructed out of metal for a sturdy and solid build. The M-Lok rail is capable of hosting rail segments to attach different accessories like a vertical grip, flashlight or anything else you may need. The G&G TR16 MBR 556 has a left hand friendly capability with the ambidextrous charging handle, fire selector, rear sling mount and magazine release. The ergonomic six position crane stock holds the battery compartment and has a rubber pad for extra comfort on shouldering the airsoft gun. The bolt locks back to adjust the hop up of the airsoft gun with ease. A quick change spring system allows you to swap out the spring to manage the FPS you desire. Switch the spring to reach the 350 FPS limit required for most close combat fields! The electronic trigger unit is now 50% reduced in size compared to its predecessor. This version's electronic trigger unit features an electric cut off when no magazine is inserted. Almost all AEG M4 magazines are compatible with the TR16 MBR 556WH G2. However, G&G has included a proprietary mid capacity magazine that cuts off the electricity when there are no more BBs left. There is also a micro speaker that beeps when there is a low battery or gearbox issue that is not allowing you to shoot the airsoft gun properly.No additional tools are needed to adjust the full auto fire to 3 or 5 round burst with the assistance of the installed G2 MOSFET. Internally, the gearbox shell is reinforced with height and thickness to hold up through tougher usage over time. There is a redesigned bevel gear that lowers power consumption and has less heat generated to keep the stress to a minimum. The air nozzle and thicker padded cylinder come with a double o-ring to keep the compression tight for better air flow and consistent FPS. G&G has also installed a cover near the top motor area so that the pinion gear does not tear up the wires. Overall, the G&G TR16 MBR 556WH G2 M4 packs a ton of features that will not dissapoint.