Warning

 

Close

Confirm Action

Are you sure you wish to do this?

Confirm Cancel
BCM
User Panel

Page AR-15 » AR Basics
AR Sponsor: bravocompany
Site Notices
Posted: 3/29/2021 6:13:46 PM EDT
Hi  does anyone know what the vertical line  just below the pic rail in the boxy protrusion toward the front of the left side upper is used for?   is it a forge marking ?  Is it a reference point for something?   See pic attached   Thanks !!
Link Posted: 3/29/2021 7:12:56 PM EDT
[#1]
Reference line for the original forging.
Link Posted: 3/29/2021 9:09:34 PM EDT
[#2]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Reference line for the original forging.
View Quote
This
Link Posted: 4/26/2021 3:27:36 AM EDT
[#3]
Hahahah you trying to win a free 80% lower?   Good luck...
Link Posted: 4/26/2021 4:36:43 PM EDT
[#4]
Witness mark on the forging for a reference to machine from.
Link Posted: 4/26/2021 5:36:09 PM EDT
[#5]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Hahahah you trying to win a free 80% lower?   Good luck...
View Quote


Ha Ha You busted him, G2nverse on u tube lol.
Link Posted: 4/26/2021 6:22:43 PM EDT
[#6]
Also one will notice that its the mark that shows how far into the upper the gas tube progresses.........check it you will be AMAZED!Attachment Attached File
Link Posted: 6/19/2021 12:09:50 AM EDT
[#7]
I learned something new tonight
Link Posted: 6/27/2021 5:05:43 PM EDT
[#8]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Also one will notice that its the mark that shows how far into the upper the gas tube progresses.........check it you will be AMAZED!/media/mediaFiles/sharedAlbum/You_Dont_Say_zps10fa9a40_JPG-102.jpg
View Quote



i was today years old when i learned this....lol
Page AR-15 » AR Basics
AR Sponsor: bravocompany
Close Join Our Mail List to Stay Up To Date! Win a FREE Membership!

Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. One new winner* is announced every week!

You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers.


By signing up you agree to our User Agreement. *Must have a registered ARFCOM account to win.
Top Top