Pheas Airsoft unboxes and reviews the heavily upgraded Begadi/CYMA CM.127 GEN 5.5 AEP. He points out numerous enhancements, including a threaded outer barrel, reinforced anti-reversal latch, CNC steel bushings, and an improved hop-up system. The pistol also features a fixed metal slide, fiber optic sights, and a programmable MOSFET for functions like pre-cocking.

Performance tests showcase the AEP's significant capabilities. He demonstrates that with the upgrades, the pistol can over-hop 0.25g BBs and achieve a range of over 50 meters. The rate of fire test also confirms a high rate of fire for a 7.4v battery, leading him to conclude that the pistol is a competitive sidearm capable of keeping up with standard AEGs.

Finally, the review covers practical aspects such as using the safety and magazine release while wearing gloves, as well as the compatibility of standard and extended magazines, including a drum mag. Pheas Airsoft says that the CM.127, with all its reinforcements and upgrades, is an absolutely "fantastic piece of kit."