Currently, these are the serial number ranges and their various markings:
MODEL A
SA 01001 through SA 08038
- left receiver (right- UZI semi-auto/MODEL A/9mmPARA/IMI – ISRAEL)
- right receiver (left- ACTION ARMS,LTD/Phila.Pa/serial number)
- underneath (nothing)
SA 08396 through SA 18231
- left receiver (right- UZI semi-auto/MODEL A/9mmPARA/IMI – ISRAEL)
- right receiver (left- ACTION ARMS, LTD/Phila.Pa/serial number)
- underneath (nothing)
SA 18938 through SA37000
- left receiver (right- UZI semi-auto/MODEL A/9mmPARA/IMI – ISRAEL)
- right receiver (left- ACTION ARMS,LTD/Phila.Pa./serial number)
- underneath (nothing)
a) SA XXXXX (smaller size font; “Phila.Pa” higher); SA XXXXX (same size font; “Phila.Pa” centered; SA XXXXX (same size font; “Phila.Pa.” centered)
MODEL B
(SA 37001 through SA 73589 (purportedly ends at SA 73544)
SA 37001 through SA 59969
- left receiver (right- UZI semi.auto (no dot on the "i")/MODEL B/9mmPARA/IMI – ISRAEL)
- right receiver (left- ACTION ARMS,LTD/Phila.Pa./serial number)
- underneath (nothing)
SA 60159 through SA 63815
- left receiver (right- UZI semi.auto (no dot on the "i")/MODEL B/9mm PARA/IMI – ISRAEL)
- right receiver (left- ACTION ARMS, LTD/Phila.Pa./serial number)
- underneath (nothing)
SA 64245 through SA 73589
- left receiver (right- UZI semi.auto (no dot on the "i")/MODEL B/9mm PARA/IMI – ISRAEL)
- right receiver (left- ACTION ARMS, LTD/Phila.Pa./serial number)
- underneath (nothing)
a) SA XXXXX (same size font; “Phila.Pa.” same size as AAL/centered) ; SA XXXXX (same size font; “Phila.Pa.” larger than AAL/centered); SA XXXXX (larger “SA” and smaller serial number; “Phila.Pa.” larger than AAL/centered)
Tony
MODEL A
SA 01001 through SA 08038
- left receiver (right- UZI semi-auto/MODEL A/9mmPARA/IMI – ISRAEL)
- right receiver (left- ACTION ARMS,LTD/Phila.Pa/serial number)
- underneath (nothing)
SA 08396 through SA 18231
- left receiver (right- UZI semi-auto/MODEL A/9mmPARA/IMI – ISRAEL)
- right receiver (left- ACTION ARMS, LTD/Phila.Pa/serial number)
- underneath (nothing)
SA 18938 through SA37000
- left receiver (right- UZI semi-auto/MODEL A/9mmPARA/IMI – ISRAEL)
- right receiver (left- ACTION ARMS,LTD/Phila.Pa./serial number)
- underneath (nothing)
a) SA XXXXX (smaller size font; “Phila.Pa” higher); SA XXXXX (same size font; “Phila.Pa” centered; SA XXXXX (same size font; “Phila.Pa.” centered)
MODEL B
(SA 37001 through SA 73589 (purportedly ends at SA 73544)
SA 37001 through SA 59969
- left receiver (right- UZI semi.auto (no dot on the "i")/MODEL B/9mmPARA/IMI – ISRAEL)
- right receiver (left- ACTION ARMS,LTD/Phila.Pa./serial number)
- underneath (nothing)
SA 60159 through SA 63815
- left receiver (right- UZI semi.auto (no dot on the "i")/MODEL B/9mm PARA/IMI – ISRAEL)
- right receiver (left- ACTION ARMS, LTD/Phila.Pa./serial number)
- underneath (nothing)
SA 64245 through SA 73589
- left receiver (right- UZI semi.auto (no dot on the "i")/MODEL B/9mm PARA/IMI – ISRAEL)
- right receiver (left- ACTION ARMS, LTD/Phila.Pa./serial number)
- underneath (nothing)
a) SA XXXXX (same size font; “Phila.Pa.” same size as AAL/centered) ; SA XXXXX (same size font; “Phila.Pa.” larger than AAL/centered); SA XXXXX (larger “SA” and smaller serial number; “Phila.Pa.” larger than AAL/centered)
Tony
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