https://sketchfab.com/3d-models/robinson-sr-9-1ae57fbfd3d945c0b813f1562e3d3836

The Robinson S.R. Model 9 Machine Rifle, more commonly known as the Robinson SR-9, was an Anglo-Australian burst-firing constant recoil anti-materiel rifle designed by Russel Robinson and produced in prototype form only. He drew up the plans alongside another of his projects, he release of the All Arms Ack-Ack (A.A.A.A.) requirement in an attempt to protect truck convoys. For this, Robinson proposed two contenders for the requirement; one was the SR-9 and the other an inexpensive ball-ring mount based on two spun metal rings which could support any machine gun from .303 British to .50 BMG. This mount would be adopted as the A.A.A.A. mount and development of the SR-9 ceased.The SR-9 was a burst-firing recoil-operated .50 caliber anti-materiel rifle meant to be fired from over the shoulder. Only one SR-9 was ever produced. but in the fallout timeline theres more i think it would fit uhh idk man whathttps://guns.fandom.com/wiki/Robinson_SR-9https://drive.google.com/file/d/1iNxZ-0kNYkdaGJ1s80Pb_9ELXTZw54h-/view