I would rate the M21 single trigger as on a par with the very best of the single triggers, PROVIDED IT HAS NOT BEEN MESSED WITH, to include the Boss, Miller, and Kautzky. I have never owned one, but know a number of M21 fans as references (a person I met about 7 years ago owns 63 M21s, approx. 40 of which have STs. He shoots them regularly without a complaint). Again, the operative phrase is, "NOT MESSED WITH"!
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