Ding Chavez of L'antre Du Dingo got the budget friendly Delta Armory AR15 Charlie Keymod 10" ETU AEG to review if this is a good option for those on a tight budget. The CHARLIE series is a high-quality gun made of durable ABS polymer with a CNC Type A trigger for faster reaction time. It has a unique serial number, a stock with convenient battery compartment, and ETU.