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AI MKI vs MKII or MKIII Barrel Change

Ed-G

Sergeant
Full Member
Minuteman
Jan 10, 2009
215
4
68
U.P. Michigan
I understand all the differences between the MKI, MKII and MKIII (I think).
My question is the barrel change. I know the MKII and MKIII use the same barrels. Does the MKI also use the same?