Apologies in advance if this has been asked or is a stupid question, I did search here and on the Internet in general and didn’t find a definitive answer.
I have a Colt Match Target Competition HBAR (MT6700). Although I bought it new in 2006, Colt says it is a 2000 manufacture.
Would the pivot pin in this likely be standard size or the “large pin”?
Is there anyway to tell for sure without disassembling it?
Most likely small pin.
Check this Colt pint sizes out.
Thank you Andy, I did find that and based upon it thought it was likely that it is a small pin. (That was the only thing I really found though)
That site seems to have a lot of good information, but also seems like it has been quite a long time since it was updated. (1999/2000 on most pages) and one really never knows how accurate stuff found on the internet can be…
I guess I’ll build me an upper and see how it works out… 
It will have a standard size pin. The front pivot pin and rear take down pin should be the same size, so just compare the two.
I used to own a MT6700 that was made on 2000 and the pin size was small but the FCG pin size was the large .170. Colt is has been using the mil-spec .154 FCG and M16 bolt carriers since early 2009.
Recently I bought a AR6450 that was made in 2/10 that has the .154FCG and a M16 hammer (complete with tail).
I would say before 2009 for I got a 6920 Nov of 2008 with the small pins and many before me have them as well. From what I know even summer of 2008 some got them.
this.
btw from 1999 I’ve seen only small take down pins on Colts
Colt has not made a large front pivot pin gun since the early 90’s
I had a Colt that I got in 92 and it had the large pivot pin. I don’t know when the change happened but early 90’s sounds about right.
To bring closure to this:
[ul]
[li]The pivot pins are in fact standard size.
[/li][li]The FCG pins are large (.170).
[/li][/ul]
I traded it for a current manufacture MT6700 with the small FCG pins.
Thanks for the information and help.