The required "accessories" for ANY pistol regardless of use are:
- Instruction manual; read it thoroughly several times.
- Ammo; goes without saying. Get appropriate loads for the intended use; medium-weight hollowpoints or EFMJ for defense, heavier total metal jacket for target, light FMJ or lead slugs for plinking.
- At least 3 mags. I keep one loaded with JHPs for defense and the other 2 with FMJs, normally for plinking but they work well against a BG too. Some may advocate four or five (to have two or three mags of defense ammo), especially if you carry. IPSC competitions require as many mags as you can carry.
- Cleaning kit (also goes without saying); this includes a few rags for wipedown and q-tips for digging out gunk from crevices.
- Bolt/action lock. Hardened steel shackle only, cable locks are worthless as are a lot of trigger locks. The lock is in the gun (or the gun is in the safe) whenever it is not within reach.
- "Eyes and Ears"; safety/shooting glasses and earmuffs/earplugs. Even if you shoot "outlaw", your sight and hearing are of utmost importance.
- A bag/case to take everything to the range. Any duffel bag will do, but a locking case is preferable.
If you're planning on concealed carry, you also need (in addition to the license):
- Holster; selected for comfort, reachability/draw speed, and of course concealment.
- Gun belt; one or more sturdy belts that'll keep your pants up with the extra weight, or take the weight off of your pants in the case of an internal gun belt.
- Mag pouches; in case S really HTF and you need more than a clip to off your bad guy.
- A weapon less lethal and/or faster to deploy than your gun. Pepper spray and a good folding knife are good choices and invite fewer questions when used. Carry a baton only if you can conceal it and have take the certification course.
General good-to-haves, not necessary to do the job but definitely an advantage:
- Flashlight; as bright and long-lasting as you can afford (80 lumens or better is pretty much a must otherwise it's just a giveaway). A weaponlight is handy, but very specialized; a 6-D maglight makes as good a club as a light.
- Aftermarket grip; gives you a more solid hold on the gun so squeezing the grip (low shots) is less likely.
- High-vis and/or night sights; an essential for defense, timed target, and whenever speed counts. This can be glow paint, stick-on dots, tritium cells, fiber-optic (light-gathering) material, etc.
- Range rod/quick-cleaning kit. For the unlikely occurrence that you hit a squib (dead powder) or shoot so much you foul the gun to its failure point.
- Quick-access safe; faster and more secure than an action lock; the safe can be opened in seconds or kept open while home, closed when you're out.
- Dummy rounds; chargeless, primerless rounds with or without snap caps to use for practicing drawing, firing, clearing jams, and unloading.
- A dummy gun or guns for use with a partner to practice basic handling, weapon retention, disarmament, and room-clearing.
- Pencil; always good to have one. You can do "shoot the pencil" drills to improve accuracy at home, use it to mark previous hits on a range target, and it, like anything, is a weapon.
Now when out and about, all you need are the gun with any mods (grip/sights/taclight), a few mags, and what's on the concealed carry list. If you're serious about shooting in any sense of the word, I would try to get as much of all this as possible.