Pocket Infinity

Pocket Infinity is an exotic fusion rifle. It was obtainable by completing the exotic weapon bounty Shattered Memory Fragment after obtaining the Vanguard Mentor Missive. It can now be obtained from legacy engrams sold by Xûr.

Upgrades
Pocket Infinity can also be upgraded with the following perks:

Trivia

 * After charging up and firing a burst, if the trigger is held down, the length of the burst will be extended to fire the rest of the magazine with no additional charge until the trigger is released. Each shot after the initial burst will do less damage down to a minimum cap (approximately 60% at the 4th burst).
 * The Enhanced Battery upgrade was replaced by the Speed Reload upgrade in an update. On December 1 2014, Speed Reload was replaced with Extended Mag, but with a maximum magazine capacity of 5 instead of 8.
 * Pocket Infinity, Sleeper Simulant, and ACD/0 Feedback Fence all have the Rasputin logo present somewhere on their model.