With fully upgraded internals including a roller-hammer, negative pressure nozzle and mostly steel trigger group. Power is made more stable than the traditional nozzle and your internals set to last a good long while.
True to life, the A4 model replaces the full automatic mode of the M16A3 with this newer version's 3-round burst option to help preserve accuracy and ammunition. This also helps with gas cooldown issues and helps that 50round magazine last that much longer.
Externally this gun is top notch with a high quality Prime CNC aluminum upper and lower receiver with quality to rival the real thing at a fraction of the cost. Although it's far from blowing targets away, it does an amazing job of replicating the handling of the real thing.
