Family of short range air-to-air missiles.
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Variants:

Pike 1: Very early heat seeking missile. Only capable of rear-aspect 
shots.
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Pike 2-A:  Major redesign of the Pike 1, equipped with uncaged seeker 
allowing higher angle shots and improved side aspect capability. Improved 
control surfaces and rocket motor.
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Guardian: SARH guided missile derived from the Pike 2 Family. Resulted in 
its own set of variants. The Guardian variant featured here is an upgraded 
version. Guardian missiles were gradually replaced by Pike 2-SM
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Pike 2-SM: Drastically improved seeker with all-aspect capability and 
increased gimbal limit. Higher maximum G. Retained most of the Pike 2-A 
design.
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Pike 2-E: 5th gen missile with Thermal    Imaging seeker, Thrust vectoring, IRCCM and jamming resistance. Equipped with a larger warhead and rocket 
motor.

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If you want to make a rear aspect missile I wrote a forum about it here

For IRCCM, read the pinned comment here

If you want to learn how the jamming resistance works this has an explanation