Gatling Gun
The Gatling Gun is Chris-exclusive, has infinite ammunition, and has poor accuracy and recoil; fully upgrading the VZ61 unlocks it.
How it works
The weapon is unlocked by fully upgrading the VZ61 and is listed for purchase afterward. The supplied reference says only Chris can use it and that it has infinite ammunition. It fires continuously while the trigger is held unless interrupted. Its large bullet crate obstructs the view but blocks projectiles from behind; the source also describes its accuracy and recoil as poor.
When it helps
If considering this unlock, note its Chris-only restriction and the described handling effects.
The tradeoff
The source describes poor accuracy and recoil; carrying it obstructs the view.
Read the supporting references
Check the edition and source version for patch-specific details. Guide methodology.