Yes it was a gen-1 model, I called Aries I believe Florida and they had me send the lower for a free upgrade. I had not shot the rifle much as I sent it off soon after I got it, so it's an okay trigger I have some with great triggers and then some not so much!!
Your going to hate me, I picked mine up on Columbus day 2017. I had the day off and went out looking for just this rifle. Second shop bingo they were having a 15 year anniversary store wide sale 10% off. This was on the used gun rack, while filling out the paper work another employee went and...
For a mag release I went with the Troy Ind. ambidextrous you push out the roll pin and reverse the tab.
https://worldoftroy.com/product/magazine-release-ambidextrous/
My SCR, Aero Precision handguard 19 in Green Mountain barrel