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The following weapons were used in Season 3 of the television series Nikita:
Martin (Jeffrey Pierce) aims his silenced Beretta 92FS at Nikita in "3.0" before switching to a 3rd generation Glock 17.
Beretta Px4 Storm
Nikita continues to use the Beretta Px4 Storm as her sidearm, replacing the Walther P99AS.
Beretta Px4 Storm Sub-Compact
Alex continues to use the Beretta Px4 Storm Sub-Compact as her main sidearm from the previous season.
Glock 17
The Glock 17 is visible in "3.0", carried by Hong Kong-based MSS agents, Hong Kong Police Force uniformed police as a production goof and Martin.
Smith & Wesson SW1911SC
Michael continues to use the Smith & Wesson SW1911SC as his main sidearm from the previous season.
Submachine Guns
Heckler & Koch MP5A3
Hong Kong-based MSS agents in close protection duties use Heckler & Koch MP5A3s. Some are outfitted with RIS barrel to allow the use of vertical foregrips.
Assault Rifles
Colt M4A1
Special Duties Unit operators use M4A1s with picatinny railings in "3.0".
IMI Tavor TAR-21
MSS agents in Hong Kong use IMI Tavor TAR-21s as their main assault rifle in close protection duties in "3.0".
Shotguns
Remington 870
What looks to be a Remington 870 is used by a SDU operator in "3.0".
Sniper Rifles
Kel-Tec SUB-2000
Martin uses a Kel-Tec SUB-2000 rifle in Hong Kong in the episode "3.0" fitted with a railed handguard, suppressor, riflescope and bipod. Alex later uses it after taking it from him.