A quality aftermarket trigger designed specifically to work with AR-9 firearms! The CMC PCC (Pistol Caliber Carbine) trigger is a single stage drop in aftermarket trigger that breaks just like glass! The factory set, 3.5lb trigger-pull, is ultra-smooth with absolutely no grittiness! Available in a flat bow or curved bow design. Flat Bow vs Curved Bow. Which is better? Trigger design is a matter of user preference. Both designs will perform well. The big difference between the two shapes is finger engagement with the trigger. A flat bow has more surface area and will give you a more consistent engagement with the trigger regardless of hand size. The result is a more consistent pull every time without as much emphasis on where you position your finger on the trigger. This can also make the flat bow trigger "feel" lighter. However, if you have a lot of experience with a traditional GI style trigger, a curved bow maybe best for you. Other aftermarket AR-15 triggers may not work in 9mm firearms due to differences in bolt dimensions and spring weight. The CMC PCC trigger was designed from the ground up to overcome these issues! Ultra-crisp non-adjustable 3.5lb trigger with absolutely no grittiness Super Easy to install! Patented "signature" flat trigger bow. Also available in a traditional curved bow design Includes: single stage match trigger, anti-walk fire control pins, screws and wrenches