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Old 04-05-2014, 06:45 PM   #11
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I need some school'n
Good stuff here in the stickies.

Here a nice discussion with annotated pictures
http://www.shotgunnews.com/2013/05/31/know-your-ar-handguards/

It even covers the triangular endcap for the old M16 original design.


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Old 04-05-2014, 09:15 PM   #12
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I will check it out once in my Slate,iPhone kinda sucks for this but it's better than nothing


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Old 04-07-2014, 12:59 AM   #13
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So, I assume I have a carbine?

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Old 04-07-2014, 02:26 AM   #14
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So, I assume I have a carbine?
Sure looks like it. Remember that the gas tube actually starts behind the bolt face. Take a look inside your mag well or ejection port and you will see it sticking out where it interfaces with the tube on the BCG gas key.

The fwd end of the gas tube also enters the forward sight block about 1/4 inch. this gives you a much more accurate measurement. . but it looks like you have it.

You also have the delta ring and fwd end cap that retains your foregrip or handguard. If you want to go to a fancy full-length handguard, then you will need to deal with removing the FSB and EndCap..

Otherwise, you can pick-up a railed carbine length in the style that snaps in. Your barrel won't be free floated but will still look cool, kool, kewl....

You can never really achieve a free float with a gas tube anyway, but we all like to think it is.
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