Actual history would like a word.

Following the Russian Revolution, Council of People's Commissars issued a December 10, 1918 decree requiring ordinary citizens to completely surrender private weapons and ammunition under penalty of long prison terms

At the very least only people who can afford them would have them but then that’s not a right

You can build an AR-15 for about $500 if you are patient with sales.

Or, 20 second search on gunbroker https://www.gunbroker.com/item/1197958046