The MagCinch Tool has many functions that Ar15 shooters will find useful even though you wouldn’t know it by its modest name. It has been an invaluable tool that I have been using for several years. I suppose that since it is made by MagCinch (Buffer Tech) that its primary function is to tighten MagCinch magazine couplers. I don’t own any magazine couplers and generally do not care for them but it is the multiple other functions of the tool that I use most often.
The MagCinch Tool has a set of screwdriver/scraper tips that I use frequently. One is angled for use with Phillips head screws or for scraping tight spaces. The other is sized to scrape the front of a AR-15 bolt. I rarely use them as scrapers but they are great for adjusting an Aimpoint or other optic. If you have to use them to turn more than a couple of screws, you will wish you had a real screwdriver, but they work quite well in a pinch.
The front sight adjustment tool works extremely well. It has a square hole that slips over the front sight and a small pin that you use to depress the front sight detent. You simply place it over the front sight, depress the pin, and twist. It is easy and it beats mauling the tip of a bullet.
There are also 2 different sizes of pin pushers. These have come in handy several times to push pins especially on new AR15s with very tight upper receiver to lower receiver fit. They can be used to push the pin just enough to get your fingers on it.
There is also a lanyard loop that can be used to dummy cord the tool to your gear. It would be a shame to lose such a useful tool in the field. I rarely use this feature but I can see the value.
The MagCinch Tool isn’t nearly as full featured as some of the “Leatherman” style tools that are coming to market for the AR-15, but it is much less expensive, much lighter in weight, and still extremely useful. I wish I had a dollar for every time I have been asked to pass the MagCinch tool down the firing line to fix some small problem. It is a worthy addition to your gear.