K9's APC9 MLOK handguard, clearance for 128 yuan

Man, I bought it for 218, how come it's on clearance for 128 now? Oh well, never mind. (Actually, a friend bought the first release and wanted me to make modifications, so I bought one too to modify.)

Built a few months ago, I originally wanted to design a magazine well for MP9 magazines and release it together, but I was too lazy and kept putting it off. Unfortunately, I'm on holiday at home now and don't have a 3D Printer to play with.

I modeled it using Blender; as a beginner, I wasn't very good at topology, which made it difficult to chamfer, but I personally think the sharp edges look pretty cool?

The upper rail is secured with two pairs of M4*12 screws. On the sides, just remove the original screws, take off the rail, place it into the handguard, and then reassemble.