Militech .477 Boomer Buster

Militech .477 Boomer Buster is pistol.Now, a close-in support weapon that can stop a cyberpsycho cold; nearly an express rifle in design! A 4-chamber, pepperboxstyle gun, with a folding arm brace for support.

Note: Acc and Conceal drop unless firer has the brace deployed, or a cyberarm.

Source

 * Solo of Fortune, pg.50
 * Blackhand's Street Weapons, pg.17