IT'S A TOY. IT DOESN'T FIRE. IT'S NOT COMPATIBLE WITH THE REAL GUN 
Reuploading cuz it seems like thingiverse deleted the previous one

1:1 scale AWM
printing, assembly, function in youtube video

Easy print
Interior simplified for easy print and strength of the parts

Materials needed for assembly

• M4 30mm x1
• 12mm x1
• 8mm x3
• M3 30mm x6
• m2 15mm x1
• a rubber hair tie
  (it's a recommendation, just use anything that fits)

8x scope not included! (link:https://www.thingiverse.com/thing:3019403)

Tolerance
0.3mm for moving parts, 0.2mm for fixed parts
no need to tweak anything, just use supports

same file is also uploaded on cults
https://cults3d.com/en/3d-model/game/awm-no-springs
if you buy my model from here, i would consider it as a support