ASG Olsztyn got his hands on another Delta Armory AEG to try, the Delta Armory AR15 Keymod 10" Charlie.  The Charlie series has good internal components, including a full metal-toothed SHS piston, an SHS delayer chip, a rotating Hop-up chamber, and a reinforced gearbox capable of enduring a 120-130 spring for an extended period. It also features a 6.03mm inner barrel. 

The weapon incorporates a quick-change spring QRS gen. 2, allowing for easy spring replacement without disassembly, and a swift QRS motor swap. It boasts metal 7mm bearings, robust metal wheels, and an SHS feeder lever. The weapon's body is crafted from durable ABS Polymer, offering superior quality compared to traditional plastic materials. It features a CNC modern Type trigger akin to high-end weapons and carries a unique serial number. The stock outperforms other brands in its price range in terms of handling, and battery insertion is more user-friendly. 

The weapon is equipped with a 22mm upper RIS rail for attaching accessories like a riflescope or red dot sight, an adjustable rear sight on the RIS rail, and a 14mm left-hand threaded outer barrel.