@TheWizard thank you for the respond! So, the matter of grinding?.. OK. There are a few options how to obtain a good weapons. Option #1 is to create account on residentevil.net and synchronize it with Steam. In this way you will take part in online events which go constantly and earn weapons from those events (btw, now it's going the Wanted challenge, you can earn Zaytsev 48lvl with 5 slots. You need to kill 150 enemies with names). Option #2: to play Ghost Ship with friends but there it'll be a matter of luck. For example, my student has got Thunder Raptor at Stage 19 Abyss and then has got 2 Raiders in a row (at one run!) at Ghost Ship run.
Not named weapons aren't so worse than named ones.It's also a matter of correct customization of them. I'd recommend to buy Resistance and Enhancement pack (DLCs) to have a good custom parts since the beginning

i'm really sorry but that was not very helpful. The reason - is 0:07 timing of the stage 1 video. It's much easier to get trinities with so much grind and 30 lvl top guns. But how to do it when i have only 100 hours, without that much grind? And i suggest adding grinding methods to this guide as a part of obtaining the tools to achieve trinities

Thank you very much for the awards, guys! I'm really happy if this "tutotial" helped to somebody

The best guide for me! Highly recommended to players with lack of experience or who got stuck at some stage

Amazing guide, but I would love if you want to play it with me

I can tell it's so much hard work put into this guide. Nicely done.