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Page AR-15 » Rimfire and Pistol Calibers
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Archived [ARCHIVED THREAD] - Oly upper gas tube hole, is yours open or plugged?
Posted: 1/1/2003 3:41:46 PM EDT
While shooting my Oly 45ACP upper I noticed smoke coming out from around the free float tube.
When I took the upper off I noticed that the gas tube hole is unplugged. Is this normal or is it supposed to be plugged?
Link Posted: 1/1/2003 4:00:49 PM EDT
[#1]
The upper on my 9mm upper is unplugged. I think they use standard 5.56 uppers, and modify them for the ejector "spring". I compared a 5.56 upper with my 9mm, and they look identical. Except for the pin which holds the ejector in.

Link Posted: 1/1/2003 5:43:18 PM EDT
[#2]
Quoted:
I think they use standard 5.56 uppers, and modify them for the ejector "spring".
View Quote


That is correct. leaving the gas tube hole unplugged is perfectly OK.
Archived [ARCHIVED THREAD] - Oly upper gas tube hole, is yours open or plugged?
Page AR-15 » Rimfire and Pistol Calibers
AR Sponsor: bravocompany
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