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Archived [ARCHIVED THREAD] - Old-style big hole Colt AR-15
Posted: 4/25/2021 7:04:17 PM EDT
In the old-style, big hole Colt Sporter AR-15,  was the front pivot pin (.315 inch) that joins the upper and lower receivers the only one with the big hole and but the second hole in the receiver for a standard size pin.? In other words, was there only one big hole in those old style Colts?

Link Posted: 4/25/2021 7:20:38 PM EDT
[#1]
The rear takedown pin was standard sized on all models since 1963.

Link Posted: 4/27/2021 12:30:35 AM EDT
[#2]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
The rear takedown pin was standard sized on all models since 1963.
View Quote


This.
Link Posted: 4/27/2021 3:38:01 PM EDT
[#3]
Yes.
The other non standard holes were the FCG ones till 2009.

Archived [ARCHIVED THREAD] - Old-style big hole Colt AR-15
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