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Old February 3rd, 2017, 22:03   #2
Drake
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Join Date: Dec 2001
Location: Montreal, QC
Some do but many don't feature a grub screw, so you need to tighten it down properly (some guns, like WE, addressed this by putting an o-ring behind peel washer; TM use to put a small spring behind it, which wasn't very effective. You might want to use a lock washer or threadlock).

That's for any airsoft FH, not just Chinese. Honestly I rarely see grub screws on them anymore.
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