The Binary Firing System® GEN 3 (BFSIII®) is a 3-position trigger. In position 3 it fires one round on pull and one round on release, making this trigger ideal for both tactical and competition use. The BFSIII® provides greatly reduced split times between rounds, allowing for tighter groups. The AR-Essential trigger comes with just the essential trigger components needed to install the Binary Trigger into your AR. This makes the the AR-Essential trigger a cost effective trigger option. Trigger Operation:Position 1 – Safe –Will not fire Position 2 – Semi – Fires 1 round per pull Position 3 – Binary – Fires 1 round on pull and 1 round on release FEATURES:* Release round can be canceled by simply moving our Patented selector out of Binary® mode while holding the trigger back * Easy to install  * Positive reset on release phase * Works in most AR platforms and calibers including 5.56 NATO, 308 Win, 300 BLK, 9mm, Rimfire, etc.... * Compatible with most Bolt Carrier Groups (BCG)  * Great for competition shooters, tactical shooters, and recreational enthusiasts *The AR-Essential trigger comes with curved trigger profile. Binary Firing System® waiver and release Warning: Not for civilian sales in: CA, CT, DC, DE, FL, HI, IA, IL, MA, MD, MN, NJ, NY, RI, and WA NEVER ALTER ANY COMPONENT OF THE BFSIII®.Improper installation, use, or tampering with the BFSIII® will void the warranty and MAY LEAD TO UNINTENTIONAL DISCHARGE OF THE FIREARM THAT MAY LEAD TO INJURY OR EVEN DEATH.Sales are Final, no returns once installation has been attemptedBy purchasing this product, you are accepting responsibility and liability for the serviceability of the final installation. AFTER THE BFSIII® HAS BEEN PROPERLY INSTALLED, IT IS IMPERATIVE THAT ALL USERS SEEK QUALIFIED TRAINING ON HOW TO USE THESE PRODUCTS. Trigger pin size is.154"No 80% lowers, No polymer lowers, No Carbon lowersPatent No. 9,952,012 9,952,013 10,107,580 10,393,461 10,480,881 10,480,882 11,085,724 & 11,226,165