Weapon details.
NYT- "was at least partially produced by a 3D printer. The giveaways are subtle: The Glock logo is absent from the pistol’s grip, where it would ordinarily be imprinted, and the angle of the grip is peculiar. Indentations on the grip, known as stippling, are patterned in such a way that the gun’s “fingerprint” can be directly linked to a unique free-to-download 3D-printed design known as the FMDA 19.2 Chairmanwon Remix."
The slide, barrel, and magazine were store bought. The weapon probably would have functioned properly had there been a Nelson device btwn the muzzle and the suppressor.
FDMA - free men don't ask. Presumably 19.2 refers to a Glock Model 19 and the .2 is the 2nd version of the 3D printed design. Chairmanwon is a screen name for the designer of the weapon.