11.5" or 10.3" colt upper?

[No2sc2]

So my form 1 is coming back soon, real soon! I'm still debating the 2. I put on my form 1 for 11.5" but that can be changed... What do you guys think? I have a AAC muzzle brake and M4-2000 ready for it

 

[Quiet Riot Firearms]

11.5. Easier on your parts.

 

[No2sc2]

I think AAC covers up to 10"?

 

[atlantaguns]

The 11.5 commando is time tested. My 6933 upper is my go to.

 

[Quiet Riot Firearms]

I think AAC covers up to 10"?

Yes they cover down to 10.5, but that extra inch of dwell time really helps out your longevity.

 

[No2sc2]

Awesome thanks guys!