Welcome to American Rifleman’s “Gun Of The Week,” where our staff editors examine the firearm industry’s latest offerings.

The Ruger Security-Six, Police Service-Six and Speed-Six double-action revolvers, introduced in 1970 and produced through 1988, innovated in design and construction in such ways as to challenge ...

Both revolvers and pistols can be either single-action (SA) or double-action (DA), and the SA and DA identifiers are not so much about the handgun as they are, as mentioned, about trigger function.