Elftmann Tactical SE, FA, Adjustable Trigger, Straight with Black Shoe, Fits AR-15, Anodized Finish, Red SE-B-S-FA The ELF-SE Drop-In Trigger maintains the Elftmann reputation for quality, craftsmanship and customer service in an affordable package. Extremely short takeup, clean crisp break and very short, positive reset. It has a updated look with brand features such as, adjustable pull weight being one of them!