Currently, this is the information on the MK23 Mod 0 (Military) Phases, markings, and SN ranges:
Phase I (forward slide serrations)(Military)
23-005 through 23-021 (actually seen)
1. Markings/Prototypes (left slide/left- “Hk US-GOVT. Cal. .45”; left slide/right- serial number and “B”, or “B” in circle; left frame/center- serial number; forward slide serrations; thinner width vertical striations on front/rear of grip; slide lock button on back of front trigger guard (up to lock slide/down to release slide); flat magazine well; 12-round magazine with 2 lines halfway down on each side and flat baseplate; rectangular suppressor; large square LAM; non-reflective blued finish- Phase I OHWS
Phase II (no forward slide serrations)(Military)
23-034 through 23-042 (actually seen)
1. Markings/Prototypes (left slide/left- “Hk US-GOVT. Cal. .45”; left slide/right- serial number and “B” in circle; left frame/center- serial number; forward slide serrations; wider vertical checkering on front/rear of grip; no slide lock button on back of front trigger guard; stepped magazine well; 12-round magazine with 2 lines all the way down on each side and stepped baseplate; Knight’s Armament rounded suppressor with no dimples and 3 slots/springs at the rear; no LAM; Maritime finish- Phase II OHWS
23-001 through 23-099 (total SN range for Phase I/Phase II)
Phase III (no forward slide serrations)(Military)
1. Markings/Military (left slide/left- “Hk USSOCOM Cal. .45”; left slide/right- serial number and “B” in circle; left frame/center- serial number; right barrel- HK Cal. .45/serial number and “B” in circle; no forward slide serrations; wider vertical checkering on front/rear of grip; no slide lock button on back of front trigger guard; stepped magazine well; 12-round magazine with 2 lines all the way down on each side and stepped baseplate; Knight’s Armament rounded suppressor enclosed with dimples; Wilcox/Insight LAM; Maritime finish)- Phase III OHWS
23-0100 through 23-2086
Tony
Phase I (forward slide serrations)(Military)
23-005 through 23-021 (actually seen)
1. Markings/Prototypes (left slide/left- “Hk US-GOVT. Cal. .45”; left slide/right- serial number and “B”, or “B” in circle; left frame/center- serial number; forward slide serrations; thinner width vertical striations on front/rear of grip; slide lock button on back of front trigger guard (up to lock slide/down to release slide); flat magazine well; 12-round magazine with 2 lines halfway down on each side and flat baseplate; rectangular suppressor; large square LAM; non-reflective blued finish- Phase I OHWS
Phase II (no forward slide serrations)(Military)
23-034 through 23-042 (actually seen)
1. Markings/Prototypes (left slide/left- “Hk US-GOVT. Cal. .45”; left slide/right- serial number and “B” in circle; left frame/center- serial number; forward slide serrations; wider vertical checkering on front/rear of grip; no slide lock button on back of front trigger guard; stepped magazine well; 12-round magazine with 2 lines all the way down on each side and stepped baseplate; Knight’s Armament rounded suppressor with no dimples and 3 slots/springs at the rear; no LAM; Maritime finish- Phase II OHWS
23-001 through 23-099 (total SN range for Phase I/Phase II)
Phase III (no forward slide serrations)(Military)
1. Markings/Military (left slide/left- “Hk USSOCOM Cal. .45”; left slide/right- serial number and “B” in circle; left frame/center- serial number; right barrel- HK Cal. .45/serial number and “B” in circle; no forward slide serrations; wider vertical checkering on front/rear of grip; no slide lock button on back of front trigger guard; stepped magazine well; 12-round magazine with 2 lines all the way down on each side and stepped baseplate; Knight’s Armament rounded suppressor enclosed with dimples; Wilcox/Insight LAM; Maritime finish)- Phase III OHWS
23-0100 through 23-2086
Tony
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