Blackout Defense Zero Trigger AR-15 3.0 lb Flat Black Nitride with PMC 5.56x45mm 55 Grain FMJBT 500 Rounds - $399.00 500 Rounds of PMC – 5.56x4mm – 55 Grain – FMJBT with AR-15 ZERO™ TRIGGER – FLAT The short 2mm reset makes the Zero trigger one of the fastest on the market.  The reset is also