- "High-explosive rounds consisting of a 15mm miniature warhead and gas propellent; rounds explode on surface impact with an effective explosive radius of two meters."
- ―W-Y H34 Fragmentation Rounds description (from Aliens: Colonial Marines)
The H34 Fragmentation Round is a high-explosive cartridge consisting of a 15mm warhead and gas-propellant manufactured by the Weyland-Yutani Corporation for use with an underbarrel attachment for the NSG 23 Assault Rifle and MK221 Tactical Shotgun.
- The H34 Fragmentation Round launcher in Aliens: Colonial Marines is visually identical to the U1 Grenade Launcher unit fitted to Pulse Rifles as standard. Given that the Colonial Marines Technical Manual states the U1 is capable of using a variety of ammunition types, it seems possible the name "H34 Fragmentation Round" launcher is simply a gameplay designation, and that the weapon is in fact a U1 loaded with a different ammo type. The fact the H34 is named after ammunition it fires rather than having a specific designation (unlike the U1) further supports this theory.