Star Trek IV: The Voyage Home

The following weapons appear in the film Star Trek IV: The Voyage Home:

M1911A1

The M1911A1 pistol appears in the hands of U.S. Marines onboard the U.S.S. Enterprise aircraft carrier in the 20th century in the scene where Pavel Chekov (Walter Koenig) is captured, and again when he falls and injures himself trying to escape.

M1911A1 .45 ACP

M16A1 Rifle

The majority of the U.S. Marines aboard the U.S.S. Enterprise aircraft carrier can be seen armed with M16A1 rifles as their primary weapons in the scenes where Chekov is captured and later during his ill-fated escape attempt.

M16A1 with 20 round magazine 5.56x45mm

Unknown Smith & Wesson Revolver

In the scene where the protagonists rescue Chekov from Mercy Hospital in San Francisco, San Francisco P.D. officers are seen brandishing Smith & Wesson revolvers of unknown make and model while persuing the protagonists, who use the ship's transporter to escape.