Code Geass: Lelouch of the Re;surrection (February 9, 2019).

The following weapons were used in the anime film Code Geass: Lelouch of the Re;surrection:

Pistols

C.C.'s Pistol

C.C. carries a pistol, based on the Mauser C96, during her travels after the events of the Zero Requiem. Another one is used when she pilots the Mahoraba Type-0 with Lelouch Lamperouge.

Short barreled Mauser C96 with black grips - 7.63x25mm Mauser.

C.C. takes the pistol from her bag after spotting Zilkistani asaassins.

C.C. loads up after hearing gunfire.

A shot of C.C.'s pistol after being attacked in close quarters. You can see the C96-based barrel.

Seeing Lelouch going to despair mode, C.C. decides to help him snap out of it.

Flare Gun

A flare gun is used by Zilkhistani assassin Swaile Qujappat during an infiltration op.

Swaile's flare gun prior to being fired.

Nambu Type 14

The Nambu Type 14 is seen in the movie with ex-Black Kngiht leader/Prime Minister Kaname Ohgi when he answers the call to reinforce Lelouch, although he initally decided to use it to commit seppuku. After Lelouch stops him, it's never used again.

Early Nambu Type 14 - left side.

Yep, Ohgi decides to shoot himself in the neck when he's married with a (Britannian) wife and child.

Swaile Qujappat's Machine Pistol

Swaile has a machine pistol that has a high-capacity magazine.

The hi-cap pistol with Swaile when he raids C.C. lodging.

A full shot of Swaile's pistol after being shocked.

Submachine Guns

Zilkhistani Submachine Gun

Swaile's assassins are armed with a Zilkistani submachine gun.

Masked assassin infiltrate C.C.'s lodging.

Assault Rifles

Black Knights Assault Rifle

The Kowa-era Black Knights are armed with a bullup assault rifle that's based on the Kel-Tec RFB. Ohgi and Shinichiro Tamaki use them while infiltrating Zilkistan.