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Posted: 5/5/2015 4:48:26 PM EDT
[#1]
I'm guessing if you look at most of the long-stroke designs the uppers have to be made differently, and therefore make it difficult to utilize a standard upper. Nothing wrong with the short stroke ones, all my ARs have AA systems, and all run like tops.
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Posted: 5/5/2015 8:39:22 PM EDT
[#2]
Quote HistoryQuoted:
I'm guessing if you look at most of the long-stroke designs the uppers have to be made differently, and therefore make it difficult to utilize a standard upper. Nothing wrong with the short stroke ones, all my ARs have AA systems, and all run like tops. Thx, I have an AA piston myself. I was curious about the options out there. |
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Posted: 5/5/2015 10:09:28 PM EDT
[#3]
Mine has a 16.5" Voodoo Innovations barrel with rifle length gas and an Adams Arms piston with their low mass bolt carrier. It did need some adjustment for reliable cycling and after that was done it fires flawlessly and is very smooth. I suppose if I were to plan another piston one I'd go with a mid length gas system for anything less than an 18" barrel.
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Posted: 5/6/2015 1:04:49 PM EDT
[#4]
Quote HistoryQuoted:
I'm guessing if you look at most of the long-stroke designs the uppers have to be made differently, and therefore make it difficult to utilize a standard upper. Nothing wrong with the short stroke ones, all my ARs have AA systems, and all run like tops. What has to be made different? |
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Posted: 5/6/2015 3:56:04 PM EDT
[#5]
The piston in a long-stroke system typically reciprocates with the bolt carrier. Take a look at the PWS system where the piston is part of the BCG assembly, istead of being struck by a drive rod in short-stroke systems. This means where the piston passes through the front of the upper must be machined for such. They do sell complete uppers, if you want to consider that a "conversion."
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Posted: 5/6/2015 6:13:29 PM EDT
[#6]
Quote HistoryQuoted:
The piston in a long-stroke system typically reciprocates with the bolt carrier. Take a look at the PWS system where the piston is part of the BCG assembly, istead of being struck by a drive rod in short-stroke systems. This means where the piston passes through the front of the upper must be machined for such. They do sell complete uppers, if you want to consider that a "conversion." Machining a hole in the front of the upper and bushing it to be parallel to the bore axis and large enough for a fixed piston to pass through, kind'a negates "drop-in"... |
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Posted: 5/6/2015 6:45:17 PM EDT
[#7]
On a PWS the piston separates from the BCG. It's really clever for what it's worth.
If I bought a piston AR it would be a PWS. |
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