Model 15:
Engineering and Production Changes
• 15 (1957): Stamping of model number.
• 15-1 (1959): Change extractor rod, right hand to left hand thread.
• 15-2 (1961): Delete trigger guard screw, change cylinder stop.
• 1964: Introduce 2" heavy barrel.
• 15-3 (1967): Relocation of rear sight leaf screw.
• 1968: Delete diamond grips.
• 15-4 (1977): Change to put gas ring from yoke to cylinder.
• 15-5 (1982): Pinned barrel eliminated.
• 1986: Introduction of 6" and 8-3/8" barrel.
• 15-6 (1988): New yoke retention system/radius stud package/hammer nose bushing.
• 1988: Discontinue 8-3/8" and 2" barrel.
• 1992: Discontinue 6" barrel, blue finish only.
• 15-7 (1994): Synthetic grips introduced, drill and tap frame, change rear sight leaf, change extractor.
• 1995-96: Delete square butt. • 1996: Begin shipments in blue plastic case.
• 1997: 4" barrel only/Change to MIM thumbpiece/Shipped with Master trigger locks/change to MIM trigger.
• 15-8 (1997): Changes in frame design: cylinder stop stud eliminated/Eliminate serrated tangs/ Change to MIM hammer with floating firing pin and change internal lockworks.
• 1999: Model 15 discontinued Nov. 1999.
• 2001: Model 15-8 from the Performance Center introduced (178xxx).
• 15-9 (2002): Performance Center Specials (McGivern Models).