"This is most likely the cheapest, and best quality KeyMod rail system money can buy. I had a bit of difficulty installing it on my Tippmann M4, and realized the dust cover pin was impeding the rail, so I had to file some off the pin, and it works beautifully now. The design is very sleek, and relatively light so your M4 isn't too front heavy. There are 2 QD sling swivel mount points, in case you feel like running a 2 or 3 point sling. Out of the box it comes with the barrel nut, mounting screws, and three 9 slot KeyMod rail sections. (Real spec KeyMod compatible) The rail sections are die cast metal, and are solid, but heavy. A nice installation guide in English was also included in the package. I'm not entirely sure why they made it, but there is a barrel stabilizer that screws into the front end of the rail system, and goes around your outer barrel. The finish has a very nice anodized feel, and isn't going to change anytime soon. "Boar Tactical" and "Low Profile Adapt Rail System" are laser etched on the side, and marked rail sections and other marking adorn the top rail. Bottom line: if you're looking for a nice KeyMod rail and don't want to shell out big bucks, this is for you.
Pros: affordable, well made, durable, lightweight, comfortable, comes with keymod sections, real spec
Cons: annoying install, heavy keymod sections