Fallout: New Vegas Crafting

Basics
Crafting is used for building a large range of things, which means items have a lot more practical value than in Fallout 3. Crafting covers creating custom ammunition with the use of the Repair skill, creating custom weapons using the Science skill, and through the Survival skill for cooking food and making medicinal items.

When attempting to steal drained energy cells, casings, or any type of ammunition ingredients from non-player characters there is no risk of failure, karma loss and the NPC will not react to the Courier even if detected when taking them.

Poisons (Venoms)
All poisons are created at campfires. Poisons are used to coat melee or thrown weapons and can have massive effects on your enemies. Note that one dose of poison is enough for one application to an enemy. All recipes make 3 doses.

Weapons and Weapon Repair Kit

 * ¹ Can not be produced regardless of finding the schematics, as the item was cut from the game files.