sumac upgrades
thingiverse
my understanding of ergo and overall upgrades for sumac, back plate now has extended pic rail allows aim lower with iron, handguard both with added handstop, lower now fixed with grip to avoid layer separation from heavy use, top rail now have a notch as back up iron sight.
Download Model from thingiverse
With this file you will be able to print sumac upgrades with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on sumac upgrades .