I have only put about 60 rounds through the AR. That was Christmas morningwe went out at 7:30 am and shot it off the back porch. It shot great no issues. Core 15 rifles are mil-spec plus and their warrany is excellent so I feel like you can't go wrong with them. I just put a red dot on it and my plan is to sight it in this weekend.
My wife's Bersa is standard size but I can conceal it in my front pants pocket if needed. I actually bought the LC9 for her but she didn't like the double action pull so I traded the Bersa to her. Worked for me, the LC9 is a good bit smaller and has a lazermax on it. I bought a nice in the pants holster for it and it carries great.