Wears out? The oil filter or the threaded adapter?
I must say, the thing seems useless to me, as it's taller (the oil filter part) than the sights or even a scope on practically any gun but it sure is cheap.
I'd buy one in a heart-beat if it weren't for the $200 fee. It would be $75 worth of fun but it sure isn't $275 worth.
Still happily answering to the call-sign Peetza.
The problem, as you so eloquently put it, is choice.
He is no fool who gives what he can not keep to gain what he can not lose.
-Jim Eliott, paraphrasing Philip Henry.