I got a whammy bar for my fender squier strat, but it's very tight and it doesnt swing down, is this because its the wrong type of bar?
Most likely too big for your strat. Post both a picture of it alone, and in your guitar if you can. Might help.
Most likely you've just screwed it in too tightly.
Actually called Mark!

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People with a duck for their avatar always give good advice.

...it's a seagull

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i wanna see a clip of a recto buying some groceries.

Mine had that too, when i just started using it, but now, i can just go down till it can't go any further (divebomb)
I think he means that the bar doesn't rotate well. When he lets go of it it does not fall down out of the way of his pick hand.

Take it out, lube the threads with some 3-in-1 oil or similar and screw it back in.