You should get some practice in to get
To know it.break it in
and keep 1000 rounds
in reserve.
My take.
Also, see if you can pick up spare parts, especially extractors and springs. Good holster or two, cleaning kit, maybe a light attachment after you get some iron sight training. Long range? Threaded barrel and suppressor, mulit caliber kit, etc, after buying good shotgun, 22LR, semi auto, hunting rifle, etc.