Product Description The Hiperfire Enhanced Duty Trigger (EDT) Heavy Gunner is a precision-engineered, single-stage trigger assembly designed as a significant upgrade over the standard AR-15 mil-spec trigger. Built from heat-treated alloy steels and proudly made in the U.S.A., the Heavy Gunner model features an extra-weight SwingFast Hammer Head that delivers unusually fast lock times and ultra-reliable, hard-hitting primer strikes -- all without increasing pull weight. The EDT Heavy Gunner offers 2 interchangeable hammer springs, giving the shooter a choice between a 4.5 lb. or 5.5 lb. pull weight. Its curved trigger shoe with backbone provides a comfortable, consistent pull profile featuring minimal creep, a crisp and clean break, very short over-travel, and a fast positive reset you can both feel and hear. The self-cleaning design allows debris to fall away, preventing jams and reset problems. Compatible with small-pin (.153") AR-15 lower receivers and AR-308 rifles that accept AR-15 triggers, the EDT Heavy Gunner is an ideal choice for law enforcement, competition shooting, and personal defense applications. Product Highlights SwingFast Hammer Head: Extra-weight hammer delivers unusually fast lock times and hard, positive primer strikes for maximum reliability. 2 Interchangeable Hammer Springs: Choose between 4.5 lb. or 5.5 lb. pull weight to match your shooting application and preference. Single-Stage with Minimal Creep: Crisp, clean break with very short over-travel and a fast, positive reset you can feel and hear. Self-Cleaning Design: Engineered to allow debris to fall out, preventing jams and reset problems in demanding conditions. Broad Compatibility: Fits small-pin (.153") AR-15 lower receivers and AR-308 rifles that use AR-15 triggers; installs without removing the safety selector. Specs Brand: Hiperfire Manufacturer Part Number (MPN): EDTHG UPC: 859177004386 Trigger Style: Single-Stage, Semi-Automatic Trigger Shape: Traditional Curved Pull Weight: 4.5 lb. or 5.5 lb. (2 interchangeable hammer springs) Trigger Pin Size: 0.153" (Small Pin) Finish: Matte Black Material: Heat-Treated Alloy Steel Compatible Calibers: .223 Remington, 5.56x45mm NATO, .300 AAC Blackout, .308 Winchester, 7.62x51mm NATO Compatible Platforms: AR-15, AR-10 (using AR-15 triggers) Country of Manufacture: U.S.A. Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer. ]]>