Sometimes, knowing where to look for information is more important (and correct) than trying to remember everything.
Read as many user's manuals as possible (the info may be redundant from firearm to firearm). But, knowing some specs that can be proven in print is better than using opinions.
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
Life Member NRA
Life Member NAHC