Permanent

Permanant Items are, as the name implies, permanant. These special ingame items are rare to come across, and are usually found only in the Black Market. Most permanant items are weapons, with the exception of the Clan Emblem. In the Black Market, players can switch out their default weapons or items for certain permanant ones for very large sum of NX. In the process, you lose whatever item you traded it for. However, these items are not to be confused with their LE counterparts.

Limited Edition (LE)
Limited Edition (LE) Items are also permanant items, and are extremely rare to come across. Nexon releases these from time to time, and each item differs the next. But instead of having to exchange items for one, they come as a seperate but permanant addition to your arsenal. LE items, however, are not limited to just weaponry. Other various items have also been sold permanantly, such as Clan and Player Name Color Change, and may continue to do so in the future. Like Permanant items, LE items can be bought for a large sum of NX as well, but can also be randomly awarded through the Black HiSec Cases. Usually, these items are variants of weapons ingame.

Trivia

 * As of so far, no LE item has been sold twice. It is unclear whether Nexon will ever release those items again.
 * A possibility for newer permanant items may include Camos, Vests, and Head Gear.