Hawaii Five-O (1968) - Season 4Hawaii Five-O (1968) - Season 4 - Internet Movie Firearms Database - Guns in Movies, TV and Video GamesHawaii Five-O (1968) - Season 4
The main sidearm of the Five-O detectives is the Smith & Wesson Model 36. Those who carry the handgun include Steve McGarrett (Jack Lord), Danny "Danno" Williams (James MacArthur), Chin Ho Kelly (Kam Fong) and Kono Kalakaua (Zulu). Various other characters are seen using the firearm as well.
Sirone (France Nuyen) threatens McGarrett with a Colt Pocket Positive but is unable to bring herself to use it in Season 4's premiere "Highest Castle, Deepest Grave" (S4E01).
Beretta M1934
In "Didn't We Meet at a Murder?"(S4E22), three people, TV repairman Clem Brown (Morgan Upton), businessman Frank Wellman (Bill Edwards) and rich widow Bonnie Soames (Joanna Barnes), are blackmailed into killing a crime syndicate boss. They are each given a suppressed Beretta M1934 fitted with a clear plastic hood which traps the spent cartridges.
Submachine Guns
M1 Carbine
Different variants of the M1 Carbine are seen used in the series.
Rifles
M16 SP1
The M16 is prominently used by McGarrett and HPD officers when engaging a sniper in "And I Want Some Candy and a Gun That Shoots" (S4E06).
Remington 700
The sniper Billy Shem (Michael Burns) is seen using a Remington 700 rifle while engaging the HPD in "And I Want Some Candy and a Gun That Shoots" (S4E06).
Sako 85 Hunter
Danny is seen using what appears to be a SAKO 85 Hunter rifle when taking out a sniper in "And I Want Some Candy and a Gun That Shoots" (S4E06).
Gun Store Rifles
When Billy is seen buying the rifle in "And I Want Some Candy and a Gun That Shoots" (S4E06), several rifles are seen displayed in the store.