You're a hobbiest who enjoys the details of guns and how they function.   For others it may be sports, politics, running, camping, music ect.      It always feels good to have personal area of 'expertise'.   I started with bb guns', then CO2 rifles, but my life went in another direction and I didn't go farther.  None of my 3 fathers,(all died, no divorce), owned firearms.

Food for thought...    The only way we end up with mobs of vigalante's, is if we let our police become ineffective and the good citizens of Eugene turn to viscous animals.    I've never had a problem with police, I know they are human subject to fear, stress like everybody else and make mistakes.    But I have no doubt about their intention is to protect the public.

Honestly , the only fear I have of gangs is those that think they represent America.  They have guns, they share a belief system, they are self-rightous and willing to impose their belief on me*    
*There is a 'left' as that worries me also.