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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 carries the Beretta Px4 Storm INOX as her sidearm, replacing the Walther P99AS from Season 2.
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 and Martin.
Glock 26
A Glock 26 is used by Eliza Abbot in "Innocence".
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.
Heckler & Koch MP7
Nikita continues to use the Heckler & Koch MP7 as her primary weapon, first seen in "Innocence"
Assault Rifles
Beretta ARX-160
Michael uses a Beretta ARX-160 as his main assault rifle from Season 2.
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.