Putting 700 rounds through a M249 SAW machine gun.
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Previously:
https://www.homemadetools.net/forum/...303#post126902
https://www.homemadetools.net/forum/...057#post129949
https://www.homemadetools.net/forum/...424#post131597
https://www.homemadetools.net/forum/...005#post137761
https://www.homemadetools.net/forum/...726#post163372
https://www.homemadetools.net/forum/...058#post172049
https://www.homemadetools.net/forum/...240#post172780