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Just found a post from Robb Jensen stating that SAW sold him a MK18 barrel and he measured the port at .093.
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Master Armorer/R&D at SIONICS Weapon Systems- http://sionicsweaponsystems.com
Hmm. .093 is massive. One of these days I need to see if SAW will give me a comprehensive list of factory Colt porting data.
Owner/Instructor at Semper Paratus Arms
Facebook: https://www.facebook.com/SemperParatusArms/
Semper Paratus Arms AR15 Armorer Course http://www.semperparatusarms.com/cou...-registration/
M4C Misc. Training and Course Announcements- http://www.m4carbine.net/forumdisplay.php?f=141
Master Armorer/R&D at SIONICS Weapon Systems- http://sionicsweaponsystems.com
Owner/Instructor at Semper Paratus Arms
Facebook: https://www.facebook.com/SemperParatusArms/
Semper Paratus Arms AR15 Armorer Course http://www.semperparatusarms.com/cou...-registration/
M4C Misc. Training and Course Announcements- http://www.m4carbine.net/forumdisplay.php?f=141
Master Armorer/R&D at SIONICS Weapon Systems- http://sionicsweaponsystems.com
First, the article we're discussing is written by Mike Pannone so I'd give it more credence than I might otherwise.
Second, the device in question is totally unrelated to the discussion but it is real, was posted on silencertalk, and is designed to let the FA hole vent extra gas when using a suppressor. It's on the opposite side of the gun from a right handed shooters face and iirc is designed to vent down.
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