Infill:	25
Slicer:	Cura
Printer Used:	Rep Rap 2
3D Software:	FreeCAD
Layer Height:	0.1 mm
Support Material:	No

Description
This is a freefloat handguard of a AR-15 rifle. It is 7 inches long and works best for an AR pistol. 
With a 25% infill there is 106 g of fillament used. Using hatchbox fillament 
from amazon the final cost came out to be $2.33 compared to a retail cost of $100 to $250. 

Link
https://libre3d.com/category/556/SportsOutdoors/listings/946/AR15-Freefloat-Handguard.html