The GG&G M1A Scout Scope Mount is designed for use with the M1A Scout Squad and SOCOM rifles. The manufacturer does not state what barrel diameter the GG&G M1A Scout Scope Mount is specifically compatible with. For that information I recommend contacting the manufacturer.
The GG&G M1A Scout Scope Mount is specifically intended for the Springfield M1A "Scout Squad" or "SOCOM 16", with cutout factory top handguard. The manufacturer does not list a specific barrel diameter the GG&G M1A Scout Scope Mount will work with, GG&G just states that the two models above are the only compatible models.
The GG&G M1A Scout Scope Mount GGG-1683 will not work with that model. The GG&G M1A Scout Scope Mount GGG-1683 works with M1A Scout Squad or SOCOM 16, with a cutout factory top handguard.
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No, this will not fit the M1A Loaded model.
No, this will not be compatible with any of the M1A models that come in 6.5 Creedmoor.
Yes, it will.
Recommend reaching out to manufacturer.
It will fit the stock however the rifle itself must be a "Scout Squad" or "SOCOM 16" model. It will not fit standard M1A models.