I'v had my G&P M4SO for several years now,no serious issues,but it did like breaking barrel clips in the hop-up because the inner-barrel is only held in at the hop-up and NOT at the end of the Suppressor,so it kinda floats.But after fixing it,it's never had any other issues! Great unit,awsome performance.Great bang for the buck!
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Death Before Dishonor" Bleeding Black Label"
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