OK, maybe a stupid question but is it possible to add a one shot mag extention on the Grizzly or would than even extend past the barrel?
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i dont think 1 shot extensions exist? anything more would go way past the end of the barrel...
sorry to say your not 100% corect on that.Girzz is a defense SG, doesn't need 3" shells.
Correct ammo for it is Reduced-Recoil 2-3/4".



























