Simple glide bomb kits have grown to include 1500kg Thermobaric bombs and increased range by added rocket sustainers
Glide bomb kits are a good example of the cost differences between American and Russian weapons.
The American Joint Direct Attack Munition (or JDAM) is a guidance kit that turns "dumb bombs" into "smart bombs", by giving them wings and GPS guidance.
From the moment they began to be delivered to US forces in the late 1990s, they've been somewhat of an object of envy in Russia.
The per unit cost charged by Boeing for each kit is between $20K and $80K, depending on the amount ordered by the Department of Defense.
Source: defensenews.com/air/2024/05/28/boeing-wins-75-billion-contract-from-us-air-force-for-guided-bombs/#:~:text=The%20per%2Dunit%20cost%20of,Force%20buys%20in%20a%20year.
The number above does not include the cost of the bomb itself.
Meanwhile, the manufacturer of Russia's glide bombs states that the average cost of a 1,000lb "dumb" bomb is around $3,200, and that the UMPK guidance kit adds a further 20-30% to it.
So Russian glide bombs cost anywhere from 4 times cheaper, to 16 times cheaper than American ones (this doesn't even include the actual American bomb).
As you can see in the pictures below (first two Russian, last two American), the Russia glide kit is crudely made, from simple materials, with poor welding, and pretty terrible aerodynamics. It's probably less reliable than the JDAMs are as well... but who cares when they are so cheap?

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