Hardened receiver (Fallout 76)

Hardened reciever is a weapon mod for several weapons in Fallout 76, including the Pipe pistol.

Production
Pump-action shotgun:
 * 3 Adhesive
 * 2 Nuclear material
 * 3 oil
 * 4 screws
 * 4 springs
 * 10 steel

Location
Crafted at a weapons workbench