All of these codes can be typed into your developer console using the following structure.
give [GIVE CODE]
To use these commands, you first need to run the command sv_cheats 1 to enable cheats. If you would like help using the developer console.
For example:
give weapon_scar20
This would give you a SCAR 20 in-game.
In Game Give Codes
weapon_scar20
SCAR-20 (CT Auto Sniper)
weapon_sg553
SG-553
weapon_snowball
Snowball (Danger Zone)
weapon_revolver
R8 Revolver
weapon_firebomb
Firebomb (Danger Zone)
weapon_hegrenade
High Explosive Grenade
weapon_tagrenade
Tactical Awareness Grenade (Operation Wildfire)
weapon_m249
M249
weapon_shield
Ballistic Shield (Danger Zone)
weapon_survival_bowie
Bowie Knife
weapon_butterfly
Butterfly Knife
weapon_mac10
MAC-10
weapon_ak47
AK-47
weapon_deagle
Desert Eagle
weapon_m4a4
M4A4
weapon_decoy
Decoy Grenade
weapon_karambit
Karambit
weapon_knife_skeleton
Skeleton Knife
weapon_m9_bayonet
М9 Bayonet
weapon_bayonet
Bayonet
weapon_tec9
TEC-9
weapon_knife_t
T Knife (Default)
weapon_knifegg
Golden Knife (Arms Race)
weapon_knife_stiletto
Stiletto Knife
weapon_xm1014
XM1014
weapon_p250
P250
weapon_famas
FAMAS
weapon_knife_ursus
Ursus Knife
weapon_aug
AUG
weapon_mp5sd
MP5-SD
item_heavyassaultsuit
Heavy Assault Suit (War Games)
weapon_knife_ct
CT Knife (Default)
item_sodacan
Soda Can
weapon_mag7
MAG-7
weapon_c4
Bomb (C4)
item_assaultsuit
Kevlar Armor and Helmet
weapon_bizon
PP-Bizon
weapon_ssg08
SSG 08 (Scout Sniper)
item_cutters
Rescue Kit (Hostage)
item_dogtags
Dog Tags (Hydra Operation's Kill Confirmed Gamemode)
weapon_knife
Knife
item_kevlar
Kevlar Armor (Vest, No Helmet)
weapon_ump45
UMP-45
weapon_tactical
Huntsman Knife
weapon_galilar
Galil AR
weapon_mp9
weapon_mp9
item_defuser
Defuse Kit
weapon_gut
Gut Knife
weapon_p90
P90
weapon_knife_gypsy_jackknife
Navaja Knife
weapon_tablet
Tablet (Danger Zone)
weapon_hkp2000
P2000 (P2K)
weapon_diversion
Diversion Device (Danger Zone)
weapon_glock
Glock-18
weapon_bumpmine
Bump Mine (Danger Zone)
weapon_molotov
Molotov Grenade
weapon_awp
AWP
weapon_sawedoff
Sawed-Off Shotgun
weapon_taser
Zeus (Taser)
item_nvgs
Night Vision Goggles
weapon_knife_push
Shadow Dagger
weapon_elite
Dual Berettas
weapon_knife_widowmaker
Talon Knife
weapon_mp7
MP7
weapon_knife_outdoor
Nomad Knife
weapon_flip
Flip Knife
weapon_sg556
SG 553
weapon_falchion
Falchion Knife
weapon_breachcharge
Breachcharge (Mission Gear)
weapon_nova
Nova
weapon_nova
Nova
weapon_knife_canis
Survival Knife
weapon_healthshot
Medi-Shot (Operation Wildfire)
weapon_incgrenade
Incendiary Grenade
weapon_m4a1_silencer
M4A1-S (Silenced M4)
weapon_smokegrenade
Smoke Grenade
weapon_fiveseven
Five-SeveN
item_assaultsuit
Kevlar Armor and Helmet
weapon_cz75a
CZ75-Auto
weapon_usp_silencer
USP-S
weapon_g3sg1
G3SG1 (Terrorist Auto Sniper)
weapon_negev
Negev
weapon_frag
Frag Grenade (Danger Zone)
weapon_flashbang
Flashbang Grenade