From what I've read, the Pilgrims didn't have turkey for their thanksgiving. They had venison, and sea food as their meats. Their firearms were standard matchlock muskets, (flaired muzzles or not, I do not know) maybe about 20 of them all together, (most never fired a gun prior to their voyage, but were issued some on the voyage).
Interesting story, the Indians weren't invited at first, but crashed the party out of curiosity, (they heard shooting in the air and ''whooping'' from the Pilgrims settlement as they celebrated their harvest and survival of that first year) and were welcomed to join in the festivities to which they added to greatly.