Type: Airsoft AR, M4, M16 Styled Rifle. Manufacturer: G&G. Model: ARP-556 and ARP-9. Materials: Metal and plastic/polymer construction. Weight: (ARP-9 4.4 pounds) (ARP-556 5.3 pounds). Barrel: 6 inches, metal non-rifled. Propulsion: AEG non-blowback. Action: Semi & full auto SAO. Ammunition Type: 6mm plastic Airsoft BB's. Ammunition Capacity: (ARP-9 300) (ARP-556 450). FPS: 400+ I am going to go on the record and say that the G&G ARP-556 and ARP-9 AEG Airsoft CQB Rifles would be my go to Airsoft battle rifle of choice. They have enough power for out door shooting and not too much for indoor shooting. Their compact and lightweight design will make them super easy to carry around all day and quick to place on any target in a hurry. Accuracy is not a concern since these AEG Airsoft Rifles can cut a bullseye out of a paper target no problem. Price for what you get, quality, looks. performance are all top notch with either choice of G&G ARP-556 or ARP-9 AEG Airsoft CQB Rifle you decide to go with. Read full article here: https://www.replicaairguns.com/2017/11/10/gg-arp-556-and-arp-9-aeg-airsoft-cqb-table-top-review-review