With what little information I could find, this is as close to a modern Russian regiment I could create into a usable template. Each BMP company (9 in all) has a platoon of tanks attached as would be normal SOP, split off from three tank companies, with a fourth tank company in reserve with the regimental HQ. Each of the three front line battalion has a headquarters composed of platoons with the following unit designations:
#5, mortars (81mm longtube)
#6, mortars (81mm longtube)
The AT and artillery battalions are pretty straightforward. The Regimental HQ battalion has companies set up as platoons of 6 units in each (supply, engineer, etc) with some exceptions.
I did not adjust the infantry squads and teams to fit any specific purpose. I've noticed there is a lavish amount of snipers at the platoon, company, battalion, and regimental level. If you feel the need to adjust these, do so.
Hope this helps.