Some of these appear to be freelance designs, but here goes. Images from top to bottom:
Image 1: Stockless Heckler & Koch MP5SD
Image 2: Appears to be freelance, resembles the prototype Savage carbine
Image 3: Appears to be freelance, resembles either an ISSC M22 or a Springfield Armory XD-E
Image 4: Looks sort of like a SIG SG 552 Commando based on the handguard length, but barrel is too long to be one
Image 5: Left is an Beretta PM12, middle appears to be freelance with some Heckler & Koch elements, right is a Hawk MM-1
Image 6: Ultimax 100 with an AR-15 front sight
Image 7: Colt Dragoon
Image 8: Appears to be a very poorly drawn Franchi SPAS-12
Image 9: Generic flintlock pistol
Image 10: Freelance AK design
Image 11: Left is a PPSh-41, right is an AKS, the pistol is very hard to determine but has the makings of a Beretta or White-Merrill 1907
Image 12: Appears to be a Beretta Cheetah
Image 13: Winchester rifle
Image 14: Appears to be a Franchi SPAS-12 in the foreground, background appears to be a Winchester Model 1885
Image 15: FN FAL
Image 16: Winchester rifle

This list will be updated if I find better matches.

Thank you so much weapon master! You don't mind if i come by every now and then regarding weapon identification?

First image: Sten gun
Second image: Weapon in foreground on left is a SIG Sauer SG 550, on right is a Micro-Uzi with an Uzi foregrip, background is a stockless Heckler & Koch MP5SD
Third image: Heckler & Koch G3

Image 1: Appears to be freelance
Image 2: Appears to be freelance
Image 3: Not enough details to be able to determine
Image 4: M1911-style pistol
Image 5: AR-15s, rocket launcher appears to be freelance though it takes elements from the LAW 80, pistol appears to be an IMI Jericho 941

Rifle on left looks to me like it is very loosely based on the Winchester Model 1873.

Machine pistol on right looks to me like it is very loosely based on the Škorpion.