Are you sure were talking about SPS-K and not S?
SPS-K cant carry gun and pod at the same time and its TTW is closest to MiG-21F-13, a 9.3 BR plane (in ARB). You are slow to accelerate so you really cant pull one circles like you would do in bis.
Not to mention its RWR is rear aspect only.
SPS-K was barely functional at 10.0 with flares and you would want to put it back there without them?
SPS-K is defined by its ability to carry grand total of two good IR missiles for its BR and once you fire them off, youre back to being a sidegrade to MiG-21F-13, assuming you even brought gunpod in the first place.
If you didnt and you took 2x IR + pod onstead, you fire off two missiles and you can only fly back to rearm yourself, meaning that your presence in match is extremely low.
While yes, you can carry up to 4x R-3Rs, they are not worth it over R-60s and definetively not over R-13Ms. While they can take some people by surprise in a headon, remember that they still pull only 10Gs. To get all four of them to land, you need to:
- have enough targets at high alt on the first place
- all of those targets cant be actively evading your missile
- all of those targets cant have chaff