Ear pro is the military designation/slang (at least in the Marines) for hearing protection/ear protection. How much of a nerd do you sound like when you say “hearing protection”? Say it in a nasally voice and you’ll know what I’m talking about.
“Before we step off for the range make sure you have a water source, an MRE, flak with sapis, Kevlar, gloves, eye pro (safety glasses) and *nerd voice* hEaRiNg PrOtEcTiOn or your ass is grass” it just doesn’t sound right.
If you weren’t aware, we spent the majority of the last couple decades fighting two wars in the Middle East. There’s a lot of dudes out there between 30-45 that fired a rifle for the first time and it was dubbed “ear pro” and has been ever since. A lot of people that are into guns, hunting and shooting were/are in the military. A disproportionate percentage are into such things when compared to civilians. Chances are “the gun guy” or “the hunting guy” in your department, on your job site, at your company etc. was a grunt, it’s been that way for generations. Guys that shot guns for a job and relied on them to stay alive like shooting guns at rates more than regular people. Hence military gun/shooting terms in popular gun culture.
It’s hard to call it anything else when at one point you’ve had to dig a grave in the treeline with your e-tool and bury your M4 (and have a funeral for it) because you couldn’t shoot the course of fire because you forgot your “ear pro”, or “eye pro”. “Here lies a colt M4 And Trijicon RCO. This rifle was put to death because the owner was a stupid (expletive) and didn’t pack what was on the gear list, without ear pro, it is useless. Now say you’re sorry to your rifle for letting it down” “I’m so sorry rifle”
It’s become more of an industry term as of late probably to do with some of the guntubers being military guys/operators on occasion, but the roots at the least are not in trend, just the military making up words for everyday items. Like ink stick (pen). Or moonbeam (flashlight). Some words stick, some don’t.