User blog comment:BlizzardOfOz123/Scavenged M1919/@comment-1330314-20110518211853/@comment-3579040-20110519121920

If you read the Weapon Mechanics page on top of the weapons section of my blog, you'll see that the Enhancements are crafted at the U-Invent machine. They take a varying amount of parts, from 15 brass tubes to 1 distilled water.