Decided I want to explore 3-gun shooting. I will be fielding a M&P 9mm, Mossberg 500, and a self built AR-15. I am currently working on getting my first belt rig and have pieced together a Blade-Tech setup for about $180. I have pistol holster, 2 pistol mags, 2 Safariland shotgun shell holsters and a Magpul MagLink for my AR mags. Am I missing anything that would prevent me from starting out? TIA!!