Can a bolt-action hunting rifle (long arm), be fired when target is at arm’s length? [closed]

Yesterday, I was running my homebrew system (D100), with a friend and one of my nephews over Discord. It was a zombie apocalypse theme. The situation occurred, when my friend (carrying a bolt-action hunting rifle), was rushed by an ‘infected’, and it did a ‘claw strike’, and missed. It was my friend’s turn next. He wanted to do a scoped shot with the bolt-action hunting rifle, but I informed him that the infected was at arms length (too close).

He said he still wanted to fire his rifle (which I considered a long arm), but I said the target was too close. I gave him the option of using the rifle stock to make a melee attack, but he still wanted to fire the rifle. The ‘discussion’ went on for some time, with me trying to explain to the 2 of them (a third one soon joined in), all saying that he could fire the rifle, even if the target was at arm’s length (1 to 1.5ft away?) Hunting rifle stats: Most full-size, bolt-action hunting rifles weigh more or less eight pounds, are around 41 to 42 inches long and have 22- to 24-inch barrels. This means that with scope, sling and everything hunt-ready, the typical rifle rig weighs-in at around nine pounds. So from above, the rifle needs 3.5 feet ‘clearance’ to fire.

I was telling my friend that because the target was so close, and the rifle was a ‘long arm’, he didn’t have enough ‘space’ to bring it to bare, and point the barrel end at the target (it was in his face’, almost).

Any advice would be most appreciated concerning this above situation.