Avenger minigun

Rockwell designed the Avenger as the replacement for their aging CZ53 Personal Minigun. The Avenger's design improvements include improved gel-fin cooling and chromium plated barrel-bores. This gives it a greater range and lethality, but the weapon holds half as much ammunition per reload than the CZ-53 Personal Minigun.

These sometimes appear in the shop at NCR, and several can be found in the Oil Rig.

Trivia

 * The Avenger Minigun might be named after the GAU-8 Avenger 30mm Gatling-type rotary cannon mounted on the A-10 Thunderbolt II.
 * Because of the ammo (5mm JHP not AP) and the number of bullets fired per burst (40), each one having possibility to score a critical, you can achieve the highest possible damage in Fallout 2 using this weapon, by having the right perks (Bonus Ranged Damage(2), Living Anatomy, Better Criticals), attack an un-armoured living target (like a dog for example) and score a critical that multiplies your damage by 5. Damage exceeding 5000 have been reported.
 * Because of amount of bullets fired per burst (40), Avenger requires tremendous amounts of 5mm ammo. Still some consider it superior to Vindicator Minigun, because although Avenger damage per bullet is ca. 30% lower compared to Vindicator, it fires almost the double amount of it per burst and 5mm ammunition is more common than 4.7mm caseless; plus Avenger has better range than both Vindicator Minigun and Bozar.
 * Interestingly, in Fallout 2 1.02, Avenger loaded with AP ammo always damages K-9 Cybernetic dog for zero hitpoints(no damage) in any indirect(shot through) attack, if K-9 is in your group.