G26 Textured Lower

i liked the textured version of [mussy's G19](https://www.thingiverse.com/thing:6140363) so i overlaid that on his new [G26 design](https://www.thingiverse.com/thing:6452826) and kept the texturing on the grip. all credit to mussy for both designs.

i have not printed this yet to test it's fit with the G26 parts... I also don't understand why it's 10mb in size but that's what exported from tinkercad.