You probably are a gun owner.

You might not actually possess a gun. But if you have a pension or a 401(k) or an investment in index funds, there’s a good chance that, directly or indirectly, you own shares of one or more gun manufacturers.

Like it or not, that means that your financial incentives are at least partly aligned with those of gunmakers. And in general, the more guns they sell, the more money their shareholders — in other words, you — make.

The school shooting this month that killed 17 people in Parkland, Fla., has intensified scrutiny on the various ways in which financial institutions and other companies prop up the firearms industry, whether through lending money to gun companies or having marketing partnerships with the National Rifle Association.

Many companies have severed their ties to the N.R.A. Blackstone, the private equity giant, recently contacted the hedge funds that it owns, asking about their holdings of gun stocks.