Not sure what you mean by "tech specs," but if you are asking about ammo suitability you can shoot +P loads in any model-marked K-frame revolver.

Before the current buying mania started, most fixed sight M&P style revolvers with two inch barrels from the last 60 years were going for $400-500, depending on era and condition. The adjustable sight two-inch Model 15s from the 1960s and 1970s brought $50-100 more. I have no idea what prices are like today, assuming you could find one. Way higher, I bet.

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David Wilson