[ARCHIVED THREAD] - Help Me ID this Upper Assy

Posted: 9/26/2011 12:59:17 PM EDT

Can anyone tell me the origin or model of this upper assy?

I know it is a Colt A1 upper, 11.5" heavy barrel stamped 5.56 but no other markings, Colt bolt/carrier assy., early sight tower, A1 front sight, A1 flash hider, early CAR15 type single heat shield handguards.

Is this a "Commando" barrel? I thought Commando's used a lightweight barrel assy? Was there ever a variant of the XM177E2 that used a heavy 11.5" barrel? Thoughts?

Posted: 9/26/2011 1:03:02 PM EDT

[#1]

That front sight base isn't original Colt. It's .750" in diameter. Originals are .625".

Posted: 9/26/2011 2:00:06 PM EDT

[#2]

looks like an Oly barrel...is the fsb held on with solid or roll pins?

Posted: 9/26/2011 2:41:21 PM EDT

[#3]

Quoted:
looks like an Oly barrel...is the fsb held on with solid or roll pins?

Solid pins

Posted: 9/26/2011 3:09:44 PM EDT

[#4]

yup, I'd say an Oly heavy barreled A1 upper.

is that delta ring plastic?.....looks very shiny for being anodized, unless it's dripping with oil

have some close up pics of the markings on the upper?

[ARCHIVED THREAD] - Help Me ID this Upper Assy

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[ARCHIVED THREAD] - Help Me ID this Upper Assy

[ARCHIVED THREAD] - Help Me ID this Upper Assy