Then adjust the laws as required.

SecularMotion seems to be confusing criminals in possession of a gun as opposed to the physical piece of metal being 'illegal'.

Out of roughly 300 million guns, how many are owned by criminals and how many are owned by non-criminals?

Most criminals do not respond to data calls about their criminal activities.

...and ask if I were a criminal. They just don't do that.

The problem with questions like these, is that they cannot be answered at face value because they are too vague to make sense.

Perhaps you could ask: 'How many guns in the USA...'

- Are the proceeds of a burglary, have not been recovered and returned to their owner, and therefore, by definition, are in the hands of a criminal...

- Were obtained via a 'straw purchaser' and passed on to someone not legally eligible to own one...

- Regularly carried for criminal purposes or in conjunction with other criminal activity, such as an armed drug dealer.

Those are the questions to ask.

Police departments take the task of 'getting illegal guns off the streets' very seriously.

look at the crime statistics and assume each crime is committed with a different gun.

and I'd estimate 99%+ are owned by people who can legally own guns under Federal law.

In the few states that require registration of protruding rifle handgrips or restrict post-Civil-War magazine capacities, or in a few jurisdictions where it is easier to get a gun on the black market rather than through legal channels, I'm sure the fraction of noncompliant ownership is higher. I'm not sure I'd lump an accountant with a 15-round Beretta in the same category as an armed robber or violent felon, though, even if you don't see a difference.

I know you want to make that percentage as close to 0% as you can get it, of course...

I thought the question was about guns illegally sneaking in across the border and taking the roles of legal guns.

I need to change my answer.

Out of the roughly 300 million guns in the US How many are legal? How many are illegal?

75/25 is the closest to the truth, imo. I think more like 88/12 or so, 8 incrementals woulda been better, imo.

I'm also including an 'illegal' gun as one which was purchased legally but which is owned by someone who shouldn't be owning it, due improper licensing, black market purchase, stolen, illegal in his state due recent bans or other gun control laws (sometimes due a move to another state), etc.
As well as handling a legal gun by a legal owner in an illegal manner, often clandestinely, on a regular basis.
Plus smuggled in from other countries, including substandard sh*t.

How then should firearms in states with Child Access Prevention (CAP) laws be looked at? those homes with young children where the CAP law mandates firearms be stored either in gun safes, trigger locked, ammo separate, how should these guns be listed? illegal or not? those being 'illegally' or illicitly kept about the house where kids could stumble across them & shoot willy nilly (some atrocious proportion of homes in some progun states where ~30% of guns violate the CAP law).
Law abiding gun owners, are sometimes, not so abiding.

Good laying foundation for your numbers.

You point out an important issue is that are different levels of illegal so a second breakdown could be pct felony illegal and pct poor handling illegal which you covered with the CAP, etc type question.