Which 6 ARC magazine allows longest OAL?

[fatelvis]

I'm looking for a 10-15 round capacity magazine for my AR that allows the longest possible OAL of the cartridge, and still function and feed reliably. Any help would be greatly appreciated!

 

[muvef]

It's been several years since I purchased any, but my ASC mags allow for the most oal. I also have E-lander and C-products (probably others).

 

[Retired shooter]

Use the ASC. STAINLESS mag. The stainless material is thinner, letting the OAL of your round to be longer.

To all a good night