The CAA m4series is a line of full metal constructed AEG in different styles and specs. Both the 14.5 Carbine and 10.5 CQB are equipped with the light weight nylon fiber M4S1 picatinny rail system. The official CAA trademarks and unique serial number were laser engraved on the metal receiver.
The ergonomic nylon fiber pistol grip can provide great comfort and better holding gesture. The nylon fiber collapsible buttstock can be set to 6 different positions. There is a storage compartment in the stock for 4X CR123 batteries. The adjustable cheek-rest installed on the stock's side rail can be removed to replace with other accessories, such as magazine pouch or shell holder.