Why isnt the ULE frame the customary mag thread type?

[adamd15]

Why do the new ULE frames for RTs come with Cocker threads instead of the normal Automag thread/ball detent set up. In my opinion it worked better, easier to clean when/if you chop a ball, and quicker to get in and out? If anything coudl respond with an explanation, I would apreciate it. Thank you

[mikebridge]

more barrels available for it, and reduces the 'well, i need a mag barrel, left feed, or, no, wait, is it right feed? well its not center feed, and not warp feed, uhm, can i return the barrel if i got the wrong feed?'

edit: additionally, IIRC, there is a small amount of 'barrel bounce' with the mag twist-lock barrels under high rates of fire, resulting in inaccuracies due to equipment, not user