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