This is a weapon that looks like a hunting rifle, but shoots like a gamma gun and can be bought in diamond city from the arms dealer. There is however an issue where if you aim down sight it will detonate the gamma on you, this does not cause damage to you but will obstruct your view for a moment.

*MODIFYING THIS WEAPON'S RECEIVER, MAGAZINE OR  MUZZLE WILL MAKE IT LOSE ITS GAMMA PROJECTILES*

If this weapon doesn't spawn then wait a few days until it does