For forge Gamers should have the opportunity to add in Req weapons, vehicles and power ups into their forge maps to increase the thrill and enjoyment for gamers.
This has to pop up on forums every day.
Would suggest looking for them as they have more in depth explanations. The main reason is 343 wants to keep these items exclusive to high levelled players, in order to encourage low levelled players to keep coming back in order to earn the right to use a nornfang. Many of us believe we will be given the ability to forge these items with the release of the final free dlc.