Discussion in 'Part & Accessory Classifieds' started by eldbillbo, Apr 10, 2010.
I have been asked if this is a small or large pivot pin upper a couple times now
The one i have listed has a small pivot. the only M4 large pivot receivers made are the colt m4 A2s found on some goverment carbines and some sporter lw models
the only colt large pivot receviers were made for the competition 6700 hbars and they were only produced in limited numbers before colt went all small pivot pins
I happen to have a larger pin colt flat top receiver not barrel or bolt for it and will I be posting it for sale soon the last one i had i sold it for $450 and it sold the first day i posted it
fyi armalite also made a small run of large pin flat top uppers and so did daniel defence the armalites also command a premium as they are also extremly rare
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