Forget the Russian slat armor...Army Recognition has the info on the 6S21RWS.

via Janes.

The Russian defence industry has developed a slat armour system designed for tracked and wheeled armoured fighting vehicles (AFV) for enhanced survivability against anti-tank weapons fitted with a single high-explosive anti-tank (HEAT) warhead.
These include the PG-7 rocket fired by the RPG-7, PG-9S fired by the tripod mounted SPG-9, as well as the PG18 disposable anti-tank weapon.
The slat armour can be installed on the Russian BTR-60, BTR-70 and BTR-80 8x8 amphibious armoured personnel carriers (APCs), the BMP-1 and BMP-2 tracked infantry fighting vehicles (IFVs), and the 4x4 BRDM-2 amphibious scout car.
In the case of the BTR-80 the slat armour is installed on the both sides of the vehicle and covers the upper part of the road wheels to just above the hull roof line. Provision has been made to protect the gap between the second and third road wheels on either side to enable the dismounts to enter and leave the vehicle via its side hatch.
For travelling the lower part can be folded up 180° and locked in position alongside the upper part.
The front and rear of the BTR-80 is also protected and when travelling the upper part of the front-mounted slat armour package can be folded back under the nose of the BTR-80 for improved vision in low-threat environments.

Janes dropped the headline on this one.  Forget the slat armor.  What's going on with that remote weapon station?  A little Google search took me to Army Recognition.

"At Russian Arms Expo 2015, being held from 9-12 September 2015, the Russian defense giant UralVagonZavod unveild a modernization kit installend onto the famous BTR-80 armored personnel carrier. This new kit features i.a. a 6S21 remotely-controlled weapon station.
According to UralVagonZavod, this new kit is not only dedicated to the BTR-80 APC, but can also be installed on various types of fighting/special-purpose vehicles.
The modernization kit disclosed by UVZ at RAE 2015 comprises first a 6S21 remote-controlled weapon station used to solve the reconnaissance, battlefield surveillance and target recognition using TV and IR cameras and engagement of point and group targets, both moving and fixed, by means of, in this case, of a 14.5 mm KPVT machine-gun from short halts, on the move and on the float…"

This is interesting.

The Russians are working the issues with RWS hard.  They definitely see a future for mechanized warfare.