Hello Gang,
I new here and Looking to buy my first AR15 I have been looking at BushMaster
#E2S A3 M4 SOPMOD or the Colt 6920 Not but approx $300. differance. DECISION, DECISION, DSCISION??? HELP.
Thanks
Walter
If you can afford the extra $300, go with the 6920. You will get less ridicule here that way. 
Seriously, you can’t go wrong with the Colt (I have 2), but my Bushmaster 14.5" Izzy has been flawless after 3,500 rounds or more of almost all 5.56.