I don't think being anti-gun makes one not an actual leftist.
Sure, Marx wrote that stuff in Resplendent606's comment, but:
- I think it's worth bearing in mind that when Marx wrote that, guns were still using powder and percussion caps.
- Not everything Marx said was gospel.
Anyone not in favour of recreational nukes is in agreement that there should be a limit on the amount of lethal force a person should be allowed to own, and I think reasonable people can disagree on whether or not guns are within that limit.