One interesting thing I did with this build was the small rail section on the handguard. Forgot to mention it before.
Now, opinions being like assholes, and everyone having one... I'm not a giant fan of KeyMod. When I got this matched receiver set, it was with the rail, and I wasn't gonna say no to it, for sure - GREAT matched receiver set and damn nice profile on the rail!
However, as the build was finishing up, I needed to find a small rail section for a light (in the future) and a way to add a QD socket for a forward sling mount... Well, KeyMod shiit is very specialized, pricey, and I didn't want to take up a metric shiit-ton of space just to get this done...
Enter Strike Industries, once again. They make this 7-section piece of picatinny rail WITH a QD socket in it, AND the thing works on both KeyMod and M-LOK. I wish I would have grabbed a pic of the backside of it, so you can see how it's made to fit both, but I'm not taking it back off just to get a pic for you bastages. It's a damn smart design.
At any rate, if any of you guys are looking for something like this, then search it out from Strike Industries.