The following weapons are seen in Code Of Silence:
Smith & Wesson Model 29
Smith & Wesson Model 29 with nickel finish - .44 magnum.
Mossberg 500
(Dennis Farina) Eddie Cusack (Chuck Norris)
Mossberg 500AT Shotgun - 12 gauge. Note the wood furniture.
MAC-10
Ingram MAC-10 open bolt submachine gun - .45 ACP
Uzi
Ruger AC-556K
Heckler & Koch HK94
Heckler & Koch 94 carbine with front pistol grip & barrel jacket. This modification was common and often seen firing full auto in movies of the 1980s.
M16 Rifle
M16 aka SP1 (flat "slab side receiver") with an A1 "birdcage" Flash hider, used to impersonate the M16A1 during the 1970s and 1980s. This version has a 30 round magazine - 5.56x45mm