This started in the Luftwaffe jets in the war ...
If Germany develop an start to mass produce the R4M in 1943, just equip the FW190 A-6 (the model of that era) with 24 / 48 each (the R4M weight 3.85kg each)....
In 43 the allies don't have enough escorts (if any) and FW-190 with R4M are pure death for bombers....
Bonus, the R4M don't need strategic materials that are rare.....
Is a cheap, easy to mass produce weapon, that can be used by almost any LW aircraft of the time.
Ideas of the impact in the air war ?