Elftmann Tactical SE, Adjustable Trigger, Straight with Red Shoe, Fits AR-15, Anodized Finish, Red SE-R-S 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!