I shoot handgun, Carbine and 3-Gun Comps along with being the 3-gun MD. Competition shooting is what you are comfortable shooting. It has taken me a few years to come up with a what works and what is just stupid. But here is a list of what I shoot in comps.
AR-15: DPMS AP4, accessories include ACE M4 SOCOM, Aimpoint ML2, JP/V-Tac Modular Hand Guards, Miculek Comp, JP 4.5# Spring Kit, JP AR Gas System, Enedine's AR-15 AR-RESTOR, Ambi-Mag Release, CCA G27 Tactical Handgrip, Magpul Enhanced Trigger Guard.
Handgun: Glock 37, accessories, Wolf Competition Spring kit, Ghost Tactical Connector, Springco recoil kit, Trijicon Night Sights
Shotgun: Winchester SX2 practical Mark I, Side Saddle, Sure Cycle Recoil system