Hah. It's all relative, John. BTW, the barrel lengths are figured differently. The M&P length includes the chamber, the revolver barrel length does not.
While the SP101 isn't an N frame it also isn't all that small or lightweight either. 27 oz. empty. IMO the M&P will conceal easier than the SP101 in 3". I carried OWB the SP101 327 for a short time. Compared to carrying an SR40c the Sp101 was harder to conceal due to the barrel of the SP101 would sometimes be poking out below a jacket. S&W M&P specs Specification M&P9 Glock17 Capacity 17+1 17+1 Barrel Length 4.25” 4.49” Trigger Pull 6.5lb 5.5lb Overall length 7.63” 7.32” Weight (empty) 24oz 22.04oz Overall height 5.5” 5.43” Width 1.2” 1.18” Sight Radius 6.4” 6.49” ............... SP101 Weight: 27.0–28.0 oz (765–794 g) Length: 8.0″ (203 mm) Barrel Length: 3.1″ (78 mm)
I don't really like carrying on my ankle. Maybe an LCP wouldn't be so much but even an LCR isn't that comfortable in an ankle holster. By the time I got my pant leg up the BG would already have shot me.
The 2 1/4" SP101 is virtually the same size, except for the barrel of course. And the Speed Six is noticeably heavier.