Pretty sure the bent one is the original style and that your others have been replaced with a newer style. (If you look at planetay pinball's site they have all the wms parts catalogs there with drawings and you can see what was supposed to be in it)

You probably won't be successful unbending it anyway it will probably snap. The bend was likely WMS attempt to handle hard hits on the standup before foam became a thing.

In all the FirePowers I have owned , never seen a bend like that.

If I'm looking at the parts guide correctly, looks like it is A-9267.
http://www.planetarypinball.com/reference/partsmanuals/WMS_Parts_1980/files/mobile/index.html#135
You may need to buy a couple different switches and mix and match if you want it to be "factory" looking.

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Check Pinball Resource. I need a replacement for a Bally game and Steve shows a bunch on his website.

In the 4 or 5 I've owned it's always been a mix of targets, although it was more common for the 3 power targets to be the bent style. I've never seen a firepower that had the original stickers on them either when I first saw the stickers 10-15 years ago on a site I thought they were some kind of bad-looking aftermarket mod.

The targets with the bend in them are terrible anyway, they used a very lightweight blade vs. the others. Maybe they were using up leftover EM style parts way back when the game was on the line. I don't remember well enough when firepower was new in the local arcade what style targets it had since that wasn't what I cared about then.... then it was 'what game can I play and win credits on all day with this buck I have?' (And sell to the next kid....)

Don't forget the z brick nottom of the cabinets.

The bent one is correct. You can't buy a exact Williams replacement BUT you can get one that is EXACTLY perfect if you take apart and rearrange the switch stack. My targets were so messed up I replaced every single one but most people won't want to drop $100 just to replace targets. I have a bunch of take offs out of my firepower pile if you want a straight piece. I can get the new part number if you want to go that direction. Marco has them $9.

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Just likely to add to the confusion, but here goes. I have a Firepower that I think is all original - I bought the machine at an auction that Gene had to get funding for Illinois Pinball. (Many years ago). It's in great shape, and I have not done anything to it other than remote mount the batteries. The backing plates on 1,2,4,5,6 have the 90 degree bend at the top, and 3 has a straight backing plate.

I suspect they were using what they had laying around, nothing more.

The target colors are correct. "Flashinstinct" here was making these target stickers. You might want to send a pm and see if he still has a set.

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Forgot to add.. sometimes those straight target backing plates will scratch up the bottom side of your plastics.