A4 upper VS. A3 upper

[dobarker]

Just curious, and figured it could spark some good ideas.
I don't have much experience with AR uppers, and was wondering if the M4 feed ramp cuts that make the A4 what it is are any better than an A3 upper with standard cuts.

I'm mainly trying to figure out which will take any ammo it gets fed and which will choke.

 

[chubbyzook]

my dads a2 (no m4 ramps either) has cycled fine for the last 20 + years i dont think hes ever had a problem with the gun and its probably around 10,000 k in ammo in its life alot alot were reloads some milsurp stuff a couple hundred in store brands and alot of police issue ammo

 

[dobarker]

Interesting. How about the brand of the upper? I've been looking at some no-name Cerro-Forge uppers or a Daniel Defense A4. I know the BCG plays a major role in reliability, any suggestion on the upper? Any brand will do or pick and choose?

 

[dobarker]

I appreciate it high-cap. I just ordered a YHM M-4 cut upper. The rest is down-hill from here.