Kill Bill: Vol. 1
The following weapons were used in the film Kill Bill Vol.1:
M4A1 rifles are seen in the hands of Bill's assassins during the wedding massacre.
Custom EMF Hartford 'Pinkerton' (Bird's Head Grip)
Bill's (David Carradine) handgun of choice is a nickel plated EMF Hartford 'Pinkerton' chambered in .45 Long Colt and with a bird's head grip attached. Bill seems to carry it with him into the sequel as well, this time sporting some type of custom muzzle brake.
Heckler & Koch PSG-1
Norinco Type 54
During the anime segment, Matsumoto's guards are seen armed with some variants of the Tokarev TT-33 pistol, probably the Norinco Type 54, given the Asian setting, but it's impossible to tell for certain. The slides only lock back half way when empty.
O-Ren and a bad guy are seen using .50 AE Desert Eagle pistols during the anime segment. O-Ren uses one to great effect to kill to thugs, blasting off body parts with each shot.
In the anime segment, Pretty Riki uses it to ignite liquor bottles in O-Ren's house.