The following weapons were used in the film Spiders, aka Spiders 3D:
What appears to be a Beretta 92FS is seen wielded by several characters including Jason Cole (Patrick Muldoon) and Col. Jenkins (William Hope). As the film was shot in Bulgaria, this is more likely a Kimar Model 92 blank-firing replica.
(Faux) M16A2 (Bulgarian AR)
The "M16A2" rifles used in the film appear to be Arsenal AR's housed in an M16-type shell. These mockups are fitted with various M16A2 parts including the carrying handle, buttstock, front sight, and A2 handguards, but the AR charging handle is still visible. This movie was filmed in Bulgaria, hence the same armorers used the mockups that were also featured in the Jean-Claude Van Damme films Universal Soldier: Regeneration and The Shepherd: Border Patrol.
A humvee is seen with what supposed to be an M134 Minigun mounted on the roof.