Already made a post on it, here is my feedback copied from https://forum.stylis-studios.com/topic/501/test-place-update-5-29-20
Here are my opinions on it.
-AA12 was already overpowered and the long barrel just buffed it, it would be okay if it was either the drum or the long barrel but the both of them combined with flechette is just devastating. I would suggest a nerf for the AA12, give it the handling of the M107.
-The DBV12 has way too much ammo in the magazine for new conversion. its damage may be weak but people just lie down and spray hallways with it(as usual). however it is really fun and not too strong.
-Canted Acog is really cool but on the Colt LMG the carry handle blocks half the view.
-AK103/AK105/AN94 changes are really cool and fun.
-RPK Drum mags?