One cannot rely on forums and internet lawyers. Go to the source. Every state has internet access to its statutes. In Colorado, they're called Colorado Revised Statutes or CRS. In addition, each legislative session publishes its activities each year during the session. With a little investigation, current legislation can be followed, and final laws accessed online. Gun laws are often in criminal codes, or safety sections.
The real kicker is that such regulations are often difficult to wade through. Such research requires close reading, with frequent cross checking and referring to other sections of laws. So, reading regulations becomes an art in itself.
At the federal level, all US regulations are codified in the Code of Federal Regulations, or CFR. There are 50 Titles, each covering an aspect of government function. For example, title 49 covers transportation, title 27 covers the ATF. Title 29 covers labor. For quick access, go to "eCFR".
Congress (House and Senate) passes or enacts laws. They have myriad names and often contain wholly unrelated topics. But that's another issue. These are codified in the UNITED STATES CODE. These are the actual laws passed by Congress. These laws are in turn assigned/given to an agency, such as the EPA, DOT, or ATF. These agencies in turn create regulations to carry out the more general actions or conditions specified in the congressional laws. Hence, most of the detailed rules/regs we have to abide by are not generated by elected officials but written by bureaucratic employees who are humans, subject to the vagaries of human thinking /reasoning and often biased. These agency derived regulations are codified in the above-described CFR.
Upshot is, to really know the actual law, you need to go to the true source. Online forums, specialized group advice, commercial or legal sites may or may not be well constructed, updated, or interpreted.
Apologies for the civics lesson. -West out