Actually, the 10mm pistol Sonny Crockett used was a Dornaus and Dixon Bren Ten. The Detonics he frequently carried in an ankle holster was a .45 ACP.
The very first episode, he used a Sig 220 in .45 ACP, then swiched to the Bren Ten. The last couple of seaons, he went to a S&W 645.
All this firepower, and Ricardo Tubbs packed S&W Bodyguard! Oh, and every now and then Tubbs would carry an Ithaca Model 37 Stakeout with a folding grip on the pump handle.