|For an overview of assault rifle models, see assault rifle.|
Considered to be "one of the best assault weapons ever made" by some, the Heckler & Koch G 11 uses 4.7mm caseless ammunition in a 50-round magazine. It is effective against well-protected enemies like Wanamingos, even though ammunition for it can be hard to come by.
- Frog Morton uses this weapon.
- Felix uses this weapon.
- From Randal for completing Deliver Westin's holodisk to Lynette in Vault City.
- NCR Bazaar, purchased from Buster's Fine Emporium of Armament.
- Red 888 Guns, purchased from Mai Da Chiang.