The UARC autorifle was a semi automatic rifle that used an unusual headspace actuated blowback operation. It was designed by Francis K. Young who was working for the United Automatic Rifles Corporation (UARC). The company had a legal dispute with firearm designer Melvin Johnson.
Overview[]
The UARC autorifle is a .30-06 calibre semi automatic rifle. The headspace actuated blowback operates by stretching the chambered cartridge until it unlocks the bolt to cycle its operation.