If you have an AR-15 you really need to get your hands on the Gerber Short Stack AR-15 Maintenance Tool ($30). It is so tiny that it fits inside of the Magpul, MOE, and MIAD pistol grips. It can perform 15 cleaning and maintenance functions. Heck, it is even made in Portland, Oregon.
The Short Stack’s innovative three-piece design allows shooters to create multiple wrench configurations, allowing users to tighten and loosen the buffer tube, flash hider and other accessories. The Short Stack also features a front sight adjustment tool, a pull-through handle for Otis cables, and scraping surfaces for the weapon system’s firing pin, bolt and bolt carrier. The Short Stack is compatible with Magpul M-LOK accessories, featuring a 7mm wrench and two-sided hex bits for M-LOK fasteners.