Need advice for first California compliant AR Looking in the $1,000-$5,000 range. This is going to be the only AR I buy so I want to get it right. Mainly focused on how reliable and light it is in that order. The HK MR556 has caught my eye but it is very heavy supposedly. I gravitate towards HK’s in general but the M4 has also caught my eye and I have no idea what the pros and cons of others guns are