Second sniper rifle in the catalog. Visual register differs from SR-1; the difference may be caliber, action, or intended environment.
Plausible Reeve specialty issue. The two-variant catalog suggests one rifle for standard work and one for specialty work (anti-materiel, suppressed, or different range envelope).
Open canon: distinction between the two variants, caliber, action, and the institutional reason for two rifles are reserved for the writers’ room.