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Posted: 6/24/2003 5:35:52 PM EDT
[#1]
upper receiver faq:
[url]http://www.biggerhammer.net/ar15/uppers/[/url] |
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Posted: 6/24/2003 6:00:59 PM EDT
[#2]
A Bushmaster barrel would be marked B 5.56 SS. The SS is stainless steel, if the barrel is black/teflon coated then it is probably an Olympic Arms.
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Posted: 6/24/2003 6:01:09 PM EDT
[#3]
Looks like you have an Olympic Arms barrel. A Bushmaster barrel would have the markings B MP 1/7 or 1/9 NATO. Bushmaster's flattop upper receivers do not have any markings. At least the ones that I have do not. The A2s do.
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Posted: 6/26/2003 2:08:18 PM EDT
[#4]
It's definitely an Olympic Arms barrel.
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Posted: 6/26/2003 3:52:41 PM EDT
[#5]
Any Bushmaster barrel made since '91 will be marked with some variation of:
B MP 5.56 NATO 1/9 HBAR or B MP 223 REM 1/8 HBAR (the DCM barrel) Based on the markings, the barrel you describe is definitely an Olympic Arms barrel, and likely the upper as well. All of their barrels, regardless of the actual chamber dimensions, are stamped "5.56", and the stainless ones are marked "SS". -Troy |
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Posted: 6/26/2003 4:20:28 PM EDT
[#6]
This is good info. I've just built an A2 upper with an Armalite upper reciever I got an a trade and a used Hbar type 20" barrel. Though I couldn't figger out who made the barrel as it only has 5.56 stamped on it and it is not cromed. Based on what I've read here it sounds like it is an Oly barrel. Thanks for the info.
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