Nuts 'n' Bolts (the 's on the N vary), sometimes also referred to as Metal, is a special kind of "Ammo" carried by the Constructor. The constructor may make an Autogun with 100 Nuts 'n' Bolts, and gains 50 for each scrap Autogun (his or another player's) that he picks up. A constructor spawns with 100 Nuts 'n' Bolts, which is the maximum amount of them that he may carry. When the Constructor has less then 100 Nuts 'n' Bolts, they slowly refill over time. Going back to the spawn will result in the constructor getting the full amount of Nuts 'n' Bolts.
- Before Nuts 'n' Bolts where introduced, Autoguns were free to make for the constructor, and many players rebuilt them constantly.