The Magpul M-LOK and the Hogue pistol grip cannot be bought at Traders until LL3 (way off by the time you've got here), so are each at an extortionate ₽60,000+ on the Flea Market at time of posting (currently there aren't any Hogue's left at all).
I played around with the attachments and came across a cheaper alternative, saving +₽60,000:
Magpul MOE AR-15 Pistol Grip – the two colour options are going for around ₽20,000 on Flea
Magpul M-LOK 4.1 inch guide – Mechanic LL2, ₽1,600
Attach the above to any foregrip with +6 ergonomics or higher, I used; Zenit RK-5 – Skier LL3 or ₽10,000 on Flea u/VivaLaWeeb confirms the below: Tango Down Stubby (all variants) – Skier LL2, ₽4,000 or Peacekeeper LL2, $37 (I haven't tried: KAC vertical pistol grip or others)
This leaves the build short by +2 ergo, so I replaced the stock charge handle:
Raptor Charging Handle for AR-15 – Skier LL3 or ₽20,000 on Flea – or –
Geissele ACH charging handle for AR-15 – ₽10,000 on Flea (few get listed)