a fully functional burst fire Zebra rifle
(https://falloutequestria.fandom.com/wiki/Zebra_Rifle)

“The Zebra Assault Carbine, more commonly known as the Zebra Rifle was a pre-war weapon used by the Zebra armies. The Zebra rifle is designed to fire in three shot bursts, making ammo conservation easier, as you cannot waste bullets by spraying. The Zebra Rifle also has the effect of igniting its targets, burning them alive. It was particularly infamous among the ranks of pre-war Steel Rangers for incinerating them inside their Power Armor. Currently Littlepip is the only canon owner of such a weapon, although it’s likely the rifle is more commonly found in the zebra homelands.”

i could make it more like the picture by edditing this mod: https://www.nexusmods.com/fallout4/mods/69066