SureFire 3PELIMINATOR7625824 3P Eliminator Flash Hider Black Nitride Stainless Steel with 5/8"-24 tpi Threads & 2.80" OAL for 7.62x51mm NATO AR-10 $89.00
Timney Triggers ALPHAGLOCK34 Alpha Competition 9mm Luger/40 S&W, Black Straight Trigger, Compatible w/ Most Glock Gen3-4 $183.99
Battle Arms Development BADEMCIC Enhanced Catch Fluted AR-15 8620 Steel Black Compatible w/BAD Mil-Spec Magazine Release Buttons BAD-EMR, BAD-EMMR $6.85