So, on the topic of the F124, I thought I was going nucking futs - I could have sworn my buddy Alan and I made the drive up to San Anselmo in '76 so he could buy an "F-12". Now for years and year and years, it's been F124 this, F124 that, and occasionally F127. But I just managed a peek at a page out of the Beeman's sixth Edition, and right there on the F124 F127 parts page is "F-12" in parenthesis.

So yeah, my buddy and I were shooting an F124 before it was known as the F124...