What is the best brand for swappable uppers?

[Regular Guy]

I had the same thought a long time ago and saw a Youtube video from ASGI.

http://www.airsoftgi.com/product_info.p ... ts_id=6639

http://www.airsoftgi.com/product_info.p ... ts_id=6635

But ASGI ran out of stock. I ended up buying a new AEG... I'm sure it can still be done.

Good luck!

[G Runner]

Is it going to be wired to the front or the back? If its gonna be wired to the back I would say a G&P. My G&P's upper slides off with the barrel assembly and it only requires the front pin to be taken out. Not sure if all G&P upper's are like this but mine is and its pretty snazzy.

[mossy]

Mine is like that too (G&P) but if you want to block 2 rails on it, you have to buy a Madbull ris 2 barrel nut...

[Beran]

if i were going to do it, i would use a CA. its a good base, and you can find plenty of second hand guns on the used market to get another upper.

[Jewish Ninja]

My G&P's swap out uppers (defender and M16) no problem.

You gonna rear wire your gun? Because that's kind of a must.

[VogonFord]

Give me CA M16A1/A2 body. I give you A4.

[CommieHunter]

So I'd like to make a Block II M4, but I'd like the ability to quickly switch between upper receivers (so I can have MK18 and 12" uppers).

Now, question is, what is the best brand of AEG for this? I want a brand that is high end (for example CA, G&P, etc), and I need to be able to easily find another upper receiver, so I don't have to buy a brand new complete body for it.

Any help would be greatly appreciated.

Two guns.

[pulsipher]

G&P Hands down

I have a full stock lower and a colapsible stock lower and a 7" a 10" a 14.5" a 16" and a 20" upper

[league 4]

ICS. By a lot.

[league 4]

Are you sure the rails even need to be modified?

[league 4]

Do you know what needs to be modified or changed?