WYSHTECH Airsoft overhauls a G&P MK63 Stoner light machine gun, with a primary focus on making the replica reliable enough to actually survive a day at the field. The builder opts for an AEG internal setup over the more common HPA conversion, arguing that high-quality electrical components can provide better efficiency and a massive shot count per battery charge. The goal is to reach a specific power level of 1.88 joules while maintaining a steady rate of fire that won't shred the internals.

The upgrade process involves a complete internal replacement, including a programmable MOSFET, high-strength gears, and a specialized CNC-machined hop-up unit. There is some technical detective work involved, such as troubleshooting a misaligned barrel window and dealing with a box mag that refuses to play nice with lower voltage batteries. A few "pro tips" are shared along the way, reminding viewers that reading the manual is usually more effective than throwing it across the room in frustration.

Final testing shows the machine gun performing with much better consistency, though achieving the target power level requires a surprisingly heavy spring. After swapping out a disappointing high-end barrel for a cheaper, more reliable alternative, the replica manages to hit targets accurately at long range. The project concludes as a successful, albeit expensive, transformation of a standard LMG into a durable monster ready for heavy use.