Michael's (Shane West) weapon of choice is a SIG-Sauer P220. Nikita gets a hold of Michael's after she pulls a secondary weapon during a confrontation in the pilot episode. He uses it to execute Dadich as part of a Division plot to discredit his name as a terorrist aside from being a war criminal.
Seemingly Nikita's (Maggie Q) preferred weapon in the pilot is a SIG-Sauer P239. It is a two toned DAK model, appears to be dehorned and has what looks to be a Hogue wraparound grip.
One of the bodyguards of Nikita's target early in the pilot fires a Beretta 92FS at Nikita. General Safwani's bodyguards also carry 92FS', though they don't use them to great effect. A Division assassin named Roan (Rob Stewart) uses one fitted with a suppressor throughout the episode.
A Glock 17 on a mounted RONI-G1 can be barely seen with a shoulder sling on a Division operative after he and his team assassinate a chief editor to frame Jill.
I want to say it's a Beretta Px4 Storm, but I'd need a better view of the gun to be sure.- Calgunkid
Submachine Guns
Heckler & Koch MP5A3
Among other Division recruits, Alex (Lyndsy Fonseca), Jaden (Tiffany Hines), & Thom (Ashton Holmes) are seen assembling MP5A3's as part of their training. Rospeta mercenaries working under Hanna are armed with the MP5A3, some of them suppressed when they battled Michael and Division agents sent to assist him in the New York subways. A Division operative handles on in the arsenal prior to securing Jill.
As well as the SIG SG 552, Division agents also use compact Tavor TAR-21s, fitted with suppressors and Meprolight Mepro 21 sights. It's also seen in a table with Trevor, mounted with a silencer.
Seen in a table displayed by Nikita's arm dealer contact, Trevor. Other M4A1s, fitted with may be M203 grenade launchers, are seen in the Division armory.
Two unknown shotguns are used by Alex and her accomplice in the drug store robbery in episode 1. I'm 97% sure Alex's is a Winchester 1300, but I'm not sure. And her accomplices is completely beyond me.
Nikita is seen using a Steyr HS.50 in the episode 2.0, acquired from an arms dealer named Trevor before she had a confrontation with him over killing her to get a reward from Percy. She uses it to snipe a Rospeta-linked mercenary attacking Michael.