Mine runs flawless with my dedicated A2 clone upper..CMMG Barrel and stainless BCG. Rest is USGI FN upper, Handgaurds, stock, grip. Lower is a PSA A2 clone lower. Runs great with all the mags I run it in. Black Dog Drum, 25 round BD, Sig mags, SW 15-22 mags. And all the brands of ammo I have tried so far. I use mostly federal and CCI brands though.
No tuning or anything was necessary at all. It just works. Probably more than you wanted to know or hear. But I really like this setup alot and like to show it to people. Having the A2 clone lower I even have the burst setting for binary
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I am going to try it with a 20 year old parkerized Ciener drop in kit, the type with the chamber adapter VS my dedicated BCG. Well if the PO has not lost it, but that is another story. If I get the drop in with the camber adapter delivered, I will let you know how it works out VS dedicated.
I will say one thing about the Franklin, I have used my Binary lower with my 5.56 uppers and hate it. But love it with .22 rimfire. Just too uncontrollable with 5.56 for me, and too expensive. I only bought it for rimfire in the first place. But had to try one mag with 5.56. Did not like it at all.
If you are going to have a Binary lower, make sure you have a dedicated .22 upper. It is kinda crazy what the Franklins are selling now for though. I paid 275.00 shipped for mine about 5 months back, and thought that was alot. Glad I bought it when I did,LOL