here's the working code .
Pistol (MK13) : 09 00 00 00 4D 4B 32 33
Sniper (SSG82) : 0C 00 00 00 53 53 47 38 32 00 00
Melee (Knife) : 01 00 00 00 4B 6E 69 66 65 00
Grenade (Frag Grenade) : 07 00 00 00 46 72 61 67 20 47 72 65 6E 61 64 65 00 00 00
MP5 = BD 00 00 00 02 00 00 00 68 01 00 00 4D 50 35 00
M16 = C2 00 00 00 02 00 00 00 64 01 00 00 4D 31 36 41 31