The phrase "full arsenal" means having all the tools, weapons, or resources necessary to achieve a certain goal or deal with a particular situation. Full definition
Employ Bonds full arsenal of gadgets and weaponry to face notorious villains and their brutal henchmen, perform impre... (gamefaqs.gamespot.com)
Full Arsenal squad to face AC Milan: Ospina, Cech, Bellerin, Koscielny, Mustafi, Mertesacker, Chambers, Holding, Kolasinac, Maitland - Niles, Xhaka, Ramsey, Elneny, Willock, Wilshere, Welbeck, Mkhitaryan, Ozil, Nketiah, Iwobi, Nelson. (justarsenal.com)
After a couple of weeks back in full Arsenal training, Jack Wilshere played his first (vaguely) competitive football for 14 months, starting and playing 63 minutes of Arsenal U21's 1 - 0 defeat to West Brom at the Hawthorns. (arsenallatest.com)