It's a S&W 396 -- Ti Mtn Lite -- five shot L-Frame, .44 Special. It is a 3 1/8" (IIRC) 18 oz handful of DYNOMITE! With the factory Hogue Bantam Grips, it quickly becomes unpleasant to shoot as you climb the load performance ladder. Buffalo Bore 250/1,000 fps load/equiv is extremely unpleasant to shoot. The "Keith" 2400 load will run 50 to 100 fps faster than the BB load (depending upon bullet, powder lot, gun, etc.) and is the most painful revolver/load combo I've ever shot (a not to distant 2nd is the J Frame titanium scandium .357 mags w/mag ammo).
Due to the thin barrel shank ONLY STANDARD .44 SPECIAL AMMO IS RECOMMENDED by most -- even though I concur, it is probably an unnecessary warning due to recoil with anything above that level.
With all of that said, it is one handy little packin' pistol, fun to shoot with mild/moderate .44 spcl ammo, and quite accurate.
Brian Pearce did a review in Issue 293, Dec 2014, Handloader Magazine. Reviews of the 696, 329 and New M69 were in the same issue.
Paul