I found myself in a freetime these 2 weeks, so I decided to play with 1.6's M4 model one more time before I temporarily quit modding. I found an old CS 1.1 skin equipped with an M203 dating back to 2001! So I got the idea of compiling it to HL1's HD pack M4 animations.
One small issue appeared. The whole left side of the M4 was using the same textures as the right side, which made the skin look dumb. So I took the step and managed to edit the textures to fit the left side, and it turned out very well! Comparison below:
Suppressed and Un-Suppressed Editions
A total of 5 hand options: (LD|HD|Opfor|BShift|Echoes)
PeeWees and Ammo Mag models
Complete sound set from CS 1.6 Including the Grunt Shooting sounds now