Here's the basic equipment you need, broken down by each weapon type:
 

Rifle:  A reliable magazine-fed center fire rifle .223REM/5.45x39 caliber or larger, with the capacity to have enough 20 and/or 30 round magazines and a way to carry them for a 60+ round stage. A sling or case is an approved method of transporting from stage to stage once the rifle is flagged.

Pistol:  A reliable pistol caliber 9mm/38Sp or larger. Enough magazines or speed-loaders/moon clips (if revolver) for a 60+ round stage. A secure belt or drop-thigh holster which covers the trigger guard is required; holster must keep pistol secure (retention) because of vigorous movement. Some method of retaining and securing magazine or speed-loaders on you body are suggested.

Shotgun:  A reliable magazine fed shotgun, minimum 20GA, typically a 12GA. Bring #6 - #8 shot. Some method of carrying extra shells is suggested. A typical stage could require 1 to 25 rounds. A sling or case is an approved method of transporting from stage to stage once the shotgun is flagged.

Ammunition:  For local matches, 200+ rounds each of pistol, rifle, and shotgun should be sufficient. Bring more in case you have to re-shoot a stage.

Match Info:  Match information is sent out by email typically several days to a week before the match, with more detailed info of what to expect during the match and total round count. It is important for you to sign up, so you will be informed of all the latest information.