texascarl attaboy !
some really good nominees there
but
texascarl wins our #1 smiley, attaboy !
The diminuative 22 rimfire semi-auto rifle, invented in 1914, in continuous production ever since ??
1919, say some re: Remington model 24, but F.N. began production of the 22 Semi-Auto Rifle in 1914.
(sold by Remington as model 241 1935-1949, before Browning Arms existed), and likely to remain in production for years to come would be my guess. Rarely copied by others, spits 'em out the bottom; only copy I recall offhand was a low priced Norinco Interarms import quite a few years back.
Known for quality workmanship, fit & finish, also known by some as one of the relatively few semi-auto 22s with very good accuracy out of the box, often better than some bolt actions. Not "disparaged" yet not much discussed even on rimfire forums. The Ruger 10/22 has it's own cult following, even though not widely regarded for NIB accuracy (until rebuilt). The Marlin model 60 has (some say) sold more than any other make/model, and has a good reputation for out of box accuracy, "best bang for your buck", very popular for good reason.
I had supposed everyone would jump on the 25 acp, certainly gets "no respect", though as one gent pointed out, once upon a time quite popular. Moreover has been in continuous production for over a century, and still commonly seen in any well stocked gun shop. Whatever else can be said, that's a pretty remarkable track record for any cartridge. If nothing else, it sure gets a whole LOT of comment on gun forums!
The A5 shotgun, although not currently still in production, a very popular and well respected shotgun during it's long run
The Low Wall and High Wall both still highly regarded in their own niche
The 1894 lever action is today still one of the most respected rifles in history (as, of course, is the '92 and other JMB lever actions)
The BAR and Ma Deuce, both scream "RESPECT THIS !"
The Hi-Power and 1911, passe to some, but might still mightily respected and commonly used by countless thousands, possibly the MOST copied
The JMB machine guns, rightly and well honored for their war service
but "the little 22 that could"... pretty little rifle, collectors like 'em, but relatively few seem to shoot them
(milady's 1st ever rifle, still her favorite, even though she really likes her 30-30 because "it makes that good gun sound" when working the lever)
PS
The 1887 Winchester shotgun, I hadn't thought of that one
but even JMB didn't have a perfect track record, just a far better track record than anybody else ever has !