Pro-Shot VFG Rod Adaptor. Specification:Pro-Shot VFG Rod Adaptor, Shotgun, 5/16-27 Thread, Bronze, VFG-12. Pro-Shot VFG Rod Adaptor. 22-6.5mm 8/32 Threads VFG-22 is a quality addition to your gun maintenance supplies, and will contribute to proper upkeep of your firearms.