Unlike the alien blaster, the Captain's sidearm uses alien power modules instead of alien power cells. It has a silver finish to it, unlike the rusted alien blaster you find in the Capital Wasteland, and actually shoots out a spread of energy like a shotgun. Shooting the Sidearm into the air will show the spread of the energy. Each time you fire it, it uses 3 rounds and sends 6 energy projectiles. Like the Metal Blaster, it will do significantly more damage outside of V.A.T.S. due to multiple critical hits. Although it looks like a pristine alien blaster, it can only be repaired by alien atomizers, alien epoxy, or vendors.
Alien atomizerMothership Zeta (add-on) - the common variant of atomizer found on Mothership Zeta.
Atomic pulverizerMothership Zeta (add-on) - Although only slightly more powerful than the atomizer, the pulverizer uses only 12 AP to fire a shot.
Alien blaster - The common variant of blaster in Fallout 3.
Firelance - Harder to obtain, yet slightly weaker than the blaster, the Firelance causes fire damage if the target survives the initial blast and is affected by the Pyromaniacperk.