my guess is that these little ears were used for either some manufacturing tool / gauge attachment or perhaps were intended to be used as a check that the rear machining was symmetrical
it doesnt seem they align anything after assembly or provide a final flip up method for the toggle rear link underside - and they look too fragile to do much anyway - might even be a hazard to shooters face if ever touched by toggle operation like the worn lugers that rear of breechblock show some impact to that area
anybody ever seen a frame with little ear(s) broken off ?
good question !!!
Bill
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