I'm on record as mentioning I'm not a huge fan of the 3" J-frame, and that steel J-frames in general don't have a ton of applicability in my world.
Small revolvers fall into one of two categories in my world. Either they're a pocket/ankle gun, or they're a belt gun. For me, a 3" J-frame is too long for a pocket, and a steel-framed one is too heavy for a pocket. I've pocket-carried a S&W 432 (and a 442 before it) for almost 25 years now, but a steel gun would make my winter coat hang funny.
"But you could carry a 3" J-frame in a belt holster!" you say. Well, sure. But I could also carry a Detective Special, a Taurus 856/327, or a 3" Smith & Wesson K-frame in a belt holster with no more real difficulty and get a 20% ammunition capacity boost. In fact I have been carrying an 856 TORO for a year now.
This is what makes the new R.O.C. J-frame red dot mount from Shield Arms a real head-scratcher for me. It mounts to a Smith J-frame using the sideplate screws, but all the photos show it on a Model 442. That effectively makes the gun too big for a pocket and anyone who's actually carried an ankle gun should get a good belly laugh out of the idea of sticking an MRDS in the most dirt-and-lint collecting spot where it's possible to tote a blaster. (Even IWB, the 507k on my TORO needs blowing clean every few days.)
I guess you could use it to mount a dot on a belt-carried 3" 640 or something, but all the J-frame revolvers in Smith & Wesson's current catalog lineup that could really benefit from a small red dot... think the 3" Model 60, Model 63, or Model 317 ...all have adjustable rear sights, which means that they're already compatible with an Allchin-type scope mount.
I mean, I get that red dots are awesome, but we're a ways off from a functional MRDS solution for pocket guns.
(H/T to Gorillafritz.)
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