I need a favor

[Greywuuf]

Can someone measure ( or tell me from first hand info) the distance from the front edge of the barrel extension to the gas post on a carbine length barrel ?
I'm building my first upper ( from a barrel blank) and I dont have all the parts yet, but want to get this barrel cut and still have my handguards fit.

Thanks

[Quarterbore]

btt: sorry I just don't have a stripped barrel but I am planning to pull things apart to build a different pistol upper for my AR-15 pistol... I will try to get you some measurements when I attack it.

Ken

[Greywuuf]

Sorry it took so long to reply, a broken water system took out my comuters ( and my basement ) so I have been absent for a while. I am still looking for this info. I have the barrel contoured, the extension thread cut and the entension installed but I have not drilled the port yet, and my bolt/carrier should be here this week!

[TORSTEIN]

I can pull my files tomorrow. You will have them then.

[TORSTEIN]

You asked for gas post, I "read" gas port. And the info is for that.
Is it the sight shoulder(on the barrel) you may also have that.
If it is for AR-15.
The Distance From The Front Edge Of The Barrel Extension, To The Center Of The Gas Port Is 7,0." Dead On The Money.
This Is for 16", 223 barrel.
I do not know if you need it for 300 whisper, 223 or other. For 223 the gas port hole vary in size according to barrel length.

[Greywuuf]

Thanks! I am back to guns a winter is upon me again. I will put that info to use

[Tweak]

from the front of the extension the shoulder for the handguard cap is 6.750 +/- 0.005" and the center of the gas port 0.300 +/- 0.005" from the shoulder

[Greywuuf]

Exactly the answer I was looking for. Thanks a ton!