Well the obvious holster....but also, you will want more than one magazine.
Mag release button
Not very powerful
....i will elaborate
Accurate as heck, easily hit a 40 Ft target within 2-3 balls. AND you get 50+balls per 12 gram C02 cartridge...easily1
Now the mag release button is kind of oddly placed, if you put in your pocket, you run the risk of accidentally discharging the magazine. Similarly, the safety is a little farther back then to my taste, nothing that should change your decision though. Being solid in weight and density already, the cocker being plastic is not a real weakness, seeing as how it would add unnecessary massif it were metal. I realize that yes it is a very small size pistol, but i was honestly expecting a little more oomph behind those dinky 11mm paintballs. "Effective for up to 120 ft." as advertised on the box.
Its not a primary weapon of choice of course, more like a fun novelty, a good sidearm...or just a good way to bring in lots of attention.