Quote History Quoted:
You mean extinct? The M1 Super 90 was discontinued over a decade ago….
M2 was an improved recoil operated design over the M1 and the M4 is a dual gas system…
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Main differences between M1 and M2
Receiver not lightened on M1
Trigger housing Aluminum alloy not plastic on M1
Barrel rib a bit taller on the M1 (easier to fit a flip up 10-22 type sight)
Barrel lug support shorter on the M1 (that,s why you need to open up the M1 fore end to fit an M2 barrel)
Stock thicker and heavier on M1, no "comfort Tech"....(put on a nice thick Limb Saver or Kick-Eeze and same same!)
M1 weighs 1/2 -3/4 pound more depending on configuration.
All internal parts from an M2/M1 fit each other......and many other guns as well.
An M2 choke is an extended choke for an M1, M1 chokes DO NOT fit an M2.....too shallow on threads!