German V2 rocket
HIMARS high-mobility artillery rocket system (MLRS) family developed by Lockheed Martin Missiles and Fire Control under an advanced concept technology demonstration (ACTD) programme
WW2 German cruise missile V1 and ballistic missile.V2
No comment!
First of all, we all know how that German missile (and aircraft, as well as jet engine) technology was acquiered and used by all major Allies (including Russia). Moreover, no one denies that.
Second, Himars/AtACMs is not a V2 clone in any way. Current ATACMS is not the direct result of the US getting V2 in 1945. There is no design or direct technological relation. It is a silly and flawed comparison. Had you said e.g. PGM-11 Redstone there would have been some reason to compare. But that is by far less of a V2 clone as e.g. the Russian R-1 (NATO: SS-1 Scunner, Soviet code name SA11) .
V2
Weight 12,500 kg (27,600 lb)
Length 14 m (45 ft 11 in)
Diameter 1.65 m (5 ft 5 in)
Warhead 1,000 kg (2,200 lb)
Wingspan 3.56 m (11 ft 8 in)
Propellant 3,810 kg (8,400 lb) 75%
ethanol/25% water
4,910 kg (10,820 lb)
liquid oxygen
Operational range 320 km (200 mi)
Flight altitude 88 km (55 mi) maximum altitude on long range trajectory,
206 km (128 mi) maximum altitude if launched vertically.
Speed
maximum:5,760 km/h (3,580 mph)
at impact: 2,880 km/h (1,790 mph)
ATACMS
Weight 1,670 kilograms (3,690 lb)
Length 4.0 metres (13 ft)
Diameter 610 millimetres (24 in
Propellant: solid propellant
Maximum firing range 300 km
Wingspan 1,400 millimetres (55 in)
Flight ceiling 48 kilometres (30 mi)
3. We know Iran got those (a certain model/type) cruise missiles from abroad
4. All we can see it that a booster has been added: we can't look inside the missile, or the Iranian production facility.
So, based on what can be verified, that's where conclusion ends.
I apologize if I hurt your ego and/or national pride..