Upper Control Arm Washers

I'm wondering if my washers for the upper arms (for the long bolt that goes through the bushings) appear to be OEM or not. 4 of the 8 (or 2 for each arm) are thinner and have like a sloped center as pictured. All have the same inner and outer diameter. Do these look OEM?
I installed after market upper arms a few years ago but I never replaced the original washers.

 

the sloped ones look OEM, the thick flat ones look aftermarket, looks like they were waterjet/lasercut rather than stamped which isn't a typical mass production manufacturing method

 

None of them look original to me. For sure not the thick ones.

 

The top one in your photo looks OEM, as @Blueberry.Taco said the sloped center is the indicator. Are you the first owner of the truck? Could have been something a past owner did

 

Not the first owner. 2016 one previous owner but was almost completely stock.