Large front takedown pin questions

[glockycharms]

I have a Colt ar15 with the front take down pin being a two piece screwed into each other set up. If I want to swap between a “normal” upper I understand I have to get an adapter part which i don’t even know what it oooks like ir where to get it. If I use that new pin for a “normal” upper but then want to go back to the original uppper I have to use the original two piece pin?

Can someone explain this to me?

[Iraqgunz]

Search features reveal-

https://www.m4carbine.net/showthread...mall-pin-upper

https://www.m4carbine.net/showthread...y-of-my-lowers

https://www.m4carbine.net/showthread...to-M4-flat-top

[monkeywrench]

https://www.tombstonetactical.com/ca...th-feed-ramps/

[monkeywrench]

https://www.dsarms.com/p-13797-kns-p...style-315.aspx

[Tigwelder1971]

No idea how to hotlink here. JSE Surplus has the Colt offset bushings and adapter pins you need.

Tig

[glockycharms]

I’m assuming that adapter is for regular upper but if I want the old one back on I have to use what it came with right?

[Tigwelder1971]

The part adapts the front lug on the upper receiver to a std lower.

[glockycharms]

The part adapts the front lug on the upper receiver to a std lower.

So you need two pins depending on which upper you use, one pin doesn’t allows you to use both types of uppers is what I am trying ask but I don’t think people are understanding me.

[monkeywrench]

You need two different pins. Google "colt big hole lower" . If you use the two links I shared you only have to use one pin. I have a colt big hole lower with a Daniel defense big hole upper.

If not you need this:

https://www.ftfindustries.com/produc...offsetpin.html

[Tigwelder1971]

Using the above linked part will get you what you need.