Hello All, I figured i needed to get my a$$ in gear and get my ar 15 and ar 10 in order before things change for the worse in CA. I have purchased a CMMG stripped lower, CMMG Mk3 stage 2 Trigger, Hogue Grip and i am still deciding on the stock. I purchased a DPMS oracle 16" upper that, in the future, i plan to put a CHF barrel on. I have my lower almost finished with the exception of the Take Down and Pivot Pin. Does anyone have any tricks or tips on how to install the take down pin? Also, can you tell me what magazines will work with my upper/lower combination? Thank you all in advance for your help! UnlockedShooter1218 (i will post pictures once i can get it all together!)