Yeah, unless you know who the LE distributor is in your area (or state), you'd probably have to call S&W and ask to speak to someone in the LE Sales dept. The distributor would then have to call and ask what's available at that time (presuming the distributor was willing to handle a direct sale).

FWIW, I stopped by and checked a newly received, new-production 3913TSW at an agency where I know the rangemaster and the accessory rail was riveted onto the frame's dustcover (not being machined into the alloy frame).

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Ret LE Firearms inst & armorer