In Battlefield 3 for the PC, PS3, and Xbox 360, there are several weapons and equipment items you can unlock by getting a certain number of points using the Support Kit.
Here is the number of points you need to get with the Support Kit in order to unlock certain weapons and equipment.
4,000 points – C4 Explosives
11,000 points – M249
23,000 points – M18 Claymore Mine
40,000 points – M224 Mortar
60,000 points – PKP Pecheneg
90,000 points – M240B
130,000 points – M60E4
170,000 points – American: RPK-74M, Russian: M2 IAR
Check out my other guide if you’re looking for the complete list of unlockable weapons and equipment for all kits in Battlefield 3.