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Legacy Member
steel gas tube
I came across some parts (original) that were set aside for projects, I noticed the gas tube is steel as a magnet will grab it, tested the magnet on about a dozen old gas tubes but only this one will grab the magnet.
How long did these last in the system ? I would guess 1963 or 1964 ?Attachment 108505
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05-27-2020 11:47 AM
# ADS
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Advisory Panel
Wouldn't have been long as they were the ones that rusted shut in use. Imagine that...yes, about a year.
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Legacy Member
I seem to recall when working on figuring out changes, there is a instruction to replace these tubes when the rifles come in for inspection or rework, but I forget the echelon maintenance level where that update was to occur.
In that same instruction was the order to change out the old buffer, with the heavier one, to replace the firing pin if it was the old pattern and replace the rear butt screw with one that had a drain hole. I seem to recall the heavy firing pin was expected to be found in M16 only, not M16E1 or M16A1 rifles.
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Legacy Member
The Edgewater buffer was being replaced during 1967-68 but I believe the steel gas tube was changed out much sooner ?
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AlexRod85
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I guess that's between a mid length and rifle length and, i think that's 13.25 inches long for me.
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Advisory Panel
Originally Posted by
AlexRod85
that's between a mid length and rifle length
These were used long before the new odd sizes of barrel lengths.
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Legacy Member
Edgewater buffer
Which brings up another question, how long did Colt use the Edgewater buffer in the civilian AR-15 (SP1) rifle ? My four digit 25xx still has the Edgewater buffer and being used in semi auto rifles should be trouble free ?
photo shows three digit with Edgewater bufferAttachment 118783Attachment 118782
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Contributing Member
I purchased a 5 digit (sp 183XX) AR in 1971. It had a Edgewater buffer and a black bcg with forward assist notches. A few years later I swapped it for the newer buffer with my unit armorer. Looking at the prices of the Edgewater now I wish I had kept it (and the AR sp).
BEAR
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