Today’s video is about my project to build a custom SIG P365 at ModGuns. Like the P320, the P365 is built around a steel Fire Control Unit as the legal, serialized firearm. Everything else – barrels, grip frames, slides, etc – can be changed around like Legos. Now, there isn’t as much aftermarket support for the P365 as the P320 (yet), but there are still some interesting choices that can be made. I think my set of choices is results in a pretty neat gun.