Eldridge's love of pre-War relics means he has plenty to give to Algernon to keep him amused (and maybe build a nuclear missile that will allow Algernon to keep Reno hostage). He makes a killing profit on the sales, not to mention custom upgrades for weapons, handled by Algernon, an idiot savant and a mechanical genius he keeps in the basement. Of course, Eldridge doesn't sell guns out of the kindness of his heart. As he is the single largest supplier of guns, the families accept this and allow Eldridge to maintain his neutrality. That's correct: Eldridge sells to all families in New Reno, without preference.
The special one is reserved for made men of the Reno crime families. The basic one covers good, powerful weapons and is available to any client. Within its walls are stockpiled vast amounts of ordnance, divided into two types of stock. The single largest store in the entirety of Reno, the New Reno Arms focuses on weapons and ammunition.