<human>:  What are the laws surrounding the purchase of firearms? 
<bot>: The laws surrounding the purchase of firearms vary from state to state. Generally, most states require that individuals over the age of 18 must pass a background check before they can purchase a firearm. Some states may also require a waiting period and/or require the potential purchaser to obtain a license or permit in order to purchase a firearm. Further, some states may have restrictions on the type of firearms that can be purchased and/or possess. It is important to check the laws of the particular state where a firearm is to be purchased and/or possessed to ensure compliance with the applicable laws.