View Full Version : WTT: Colt M4 upper for A2 upper

08-31-2013, 9:23 AM
I have a factory Colt 6921 upper receiver (just the upper) that I would like to trade for a Colt, Bushmaster or another known brand A2 upper. I am working on a quazeye retro build and want a fixed carrying handle.

I can also throw in a Colt carrying handle to sweeten the deal if needed. Located in San Diego and have an armorers block and can do the work if needed.

Email if interested. LS1gregg@gmail.com

08-31-2013, 5:50 PM
You are aware that it's not just a swap right? You might encounter a small pin this vs a large pin that and need a conversion kit.

09-02-2013, 11:28 AM
Maybe on an old Colt, but a Bushmaster or RRA A2 upper will have the correct pin hole sizes.