G&G TR16 SBR MK II

No, you do not need external programming units. The G&G G2 system allows you to program burst fire modes directly through the trigger and fire selector interface.

This rifle is designed to run on a 7.4V LiPo battery. The integrated MOSFET helps protect the electronics, but you should avoid higher voltage batteries unless you have upgraded the internal components.

The magazine features a specialized follower that engages a switch inside the rifle when the last BB is fired. This stops the gun from cycling, letting you know instantly that you are out of ammo.

Yes, the quick-change spring guide is designed to let you swap out the main spring without disassembling the entire gearbox. You will need to remove the stock and buffer tube to access it, but it is a straightforward process.

The handguard uses the M-LOK mounting system, which is the current industry standard. You can easily attach grips, lights, or lasers designed for M-LOK rails without needing adapters.

With a muzzle velocity of 400 FPS, this rifle is well-suited for outdoor fields that allow higher engagement distances. If you plan to play at indoor CQB arenas, you should check their specific FPS limits, as this may be too hot for some close-quarters sites.