You will need to enable the developer console in the settings for these to work.

You will also need to start a Singleplayer game, preferably on the training camp map.

From there, open the console with the ~ (tilde) key and enter sv_cheats 1.

If you've already messed around with the give command in games like GMod and HL2 then this will be a walk in the park for you.

The Kolos AA was a Soviet experimental anti-air rocket launcher intended for export. The project was eventually scrapped.

It can be accessed in game with the command give weapon_kolos

The thing from Counter-Strike.

Access it through give weapon_c4

Dynamite was invented by Alfred Nobel in 1866 and patented the following year. This makes it the second oldest weapon in the game.

It can be accessed by the command give weapon_dynamite

Often called the "mini-frag" due to it's small size.

Can be accessed by give weapon_v40

It's the Fusil Robust but sawed off.

Accessed by command give weapon_robust_sog

Designed to be a replacement for the single-action army revolver. It proved to be even more popular than it's predecessor, and is still manufactured today.

Can be accessed through the command give weapon_blackhawk

Despite their absolute obsolescence, crossbows remained in use by south-east Asian indigenous people, particularly those of the Vietnamese highlands.

It is accessed through the command give weapon_crossbow

The Mamba was the first handgun manufactured entirely from stainless steel. After the war, production was moved to the United States.

It can be accessed with the command give weapon_mamba

For the dual-wield version, try give weapon_dual_mamba

The Cobra is a clone of the Sa. 23 that uses UZI mags. It was designed and primarily manufactured by Stellyte Arms. Although it is actually Semi-Auto, it is depicted as an automatic.

It is accessed through the command give weapon_cobra

There is a dual wield variant, accessed by give weapon_dual_cobra

The Kommando is a more obvious clone of the Sa. 23. It was developed for, and manufactured by Lacoste Engineering. It is also Semi-auto but depicted as automatic.

It can be grabbed by entering the command give weapon_lacoste

The dual wielded variant uses give weapon_dual_lacoste