There seems to be considerable confusion over details of the rockets fired from the 9A52-2 (top left) vehicle of the 9K58 #Smerch multiple rocket launcher (MRL) system, as well as the 9K58 Kama (TR), 9K512 Uragan-1M (BL), & 9K515 Tornado-S (BR), etc..

Of the 25 known rockets (missiles really, see later), only 2 are known to have fixed warheads. Of the others: 19 have dispenser (submunitions, mines & UAV) warheads; 2 carry separable HE-frag warheads; & 2 carry separable thermobaric (high & volumetric blast) warheads.

There are 3 known families, the 70 km range, the 90 km range, & the 120 km range. These differ primarily in their range, & hence the rocket motor fitted. Though the 120 km range family uses a new guidance systems (see images).

All rockets have basic at least 1D guidance, their range. As such they are in fact guided missiles & not simply dumb rockets. The 120 km are truly guided & would be, as per the US intelligence service’s missile classification system, close-range ballistic missiles (CRBM).

All are both drag (stabilising fins) & roll (spin) stabilised. These two stabilising methods, along with their drag, length & weight distribution, mean that a motor is stable even after the warhead has been released.

Due to being stable, the motor will continue roughly on its original trajectory until it impacts something. This has been seen again & again in recent conflicts. These motor impacts are commonly & erroneously quoted as being failed (dud) rockets. https://twitter.com/RALee85/status/1312760935422005248

The 70 km range family use the 9D167 rocket motor & the 9B171 or 9B191 guidance & control unit (GCU). The family includes: the 9M55F; 9M55S; 9M55K; 9M55K1; 9M55K3; 9M55K4; 9M55K5; 9M55K6; & the 9M55K7.

The 90 km family are thought to use the 9D52 rocket motor & the same 9B171 or 9B191 GCU. The family includes; the 9M525; 9M526; 9M527; 9M528; 9M529; 9M530; 9M531; 9M532; 9M533; 9M534; 9M536; & the 9M537.

The 120 km family, details of which are sketchy, are thought to use the 9D57 (a lengthened 9D52) rocket motor & the 9B706 (dispenser warheads) or 9B708 (fixed warheads) GCU. The family includes; the 9M542; 9M544 (below); 9M549; & the 9M555.

70 km: 9M55F carries a separable parachute-retarded HE-frag warhead; 9M55K dispenser warhead holds 72 small 9N235 HE-frag submunitions; 9M55K1 dispenser warhead holds five 9N349 Motiv-3M sensor-fuzed submunitions (SPBE).

70 km: 9M55K3 dispenser warhead holds 64 POM-2 AP mines; 9M55K4 dispenser warhead holds 25 PRM-3 AT mines; 9M55K5 dispenser warhead holds 646 or 588 small KOBE (3B30) dual-purpose (HE-frag/anti-armour) submunitions.

70 (75) km: 9M55K6 (75 km) dispenser warhead holds five 9N268 SPBE; 9M55K7 dispenser warhead holds 20 9N282 Gnom SPBE; 9M55S (70 km) carries a separable parachute-retarded thermobaric warhead.

90 km: 9M525 warhead as per 9M55F; 9M526 warhead as per 9M55K1; 9M527 warhead as per 9M55K4; 9M528 carries a lighter separable HE-frag warhead that is likely based on the 9M55F's; 9M529 warhead as per 9M55S.

90 km: 9M530 carries a fixed (non-separable) structure-penetrating (bunkers, roads, runways, etc.) warhead with a delayed-action fuze; 9M531 warhead as per 9M55K5; 9M532 warhead as per 9M55K7; 9M533 warhead as per 9M55K6.

90 km: 9M534 dispenser warheads holds a single T-90 series surveillance UAV; 9M536 warhead carries 72 light armour/runway attack penetrating HE-frag submunitions (POBE/POFBE); 9M537 carries 32 proximity-fuzed HE-frag submunitions (OBE NP).

90 km: 9M534 dispenser warheads holds a single T-90 series surveillance UAV; 9M536 warhead carries 72 light armour/runway attack penetrating HE-frag submunitions (POBE/POFBE); 9M537 carries 32 proximity-fuzed HE-frag submunitions (OBE NP).

90 km: 9M534 dispenser warheads holds a single T-90 series surveillance UAV; 9M536 warhead carries 72 light armour/runway attack penetrating HE-frag submunitions (POBE/POFBE); 9M537 carries 32 proximity-fuzed HE-frag submunitions (OBE NP).

For those unhappy with what the Smerch launches being classified as Close Range Ballistic Missiles (CRBM), please see the page capture (left) from the 'Ballistic & Cruise Missile Threat 2017' publication produced by the USA's entities NASIC & DIBMAC.

https://www.nasic.af.mil/About-Us/Fact-Sheets/Article/1235024/2017-ballistic-and-cruise-missile-threat-report/

Thanks for all the comments, recommendations & RT. It's really just a very basic & very condensed overview of what I'd already written for work. Sorry there's no annotated images/diagrams for the later posts, but all the ones I have are high-res & for the work entries.