Palmetto State Armory offers the largest selection of AR-15/AR-10 parts and accessories, including products from your favorite competition shooting brands like Elftmann Tactical! 
The ELF AR-10 Trigger is an easily adjustable (2.75-4lbs) drop-in AR trigger that is engineered to endure the power of high calibers. ELF is the only AR-15 trigger that utilizes aerospace-grade sealed bearings, delivering an incredibly smooth and fast trigger pull. An exclusive .043 double wound polished piano wire hammer spring ensures full ignition of any ammo, including .308 and 7.62x39mm. Constructed of wire EDM machined, hardened A2 tool steel and ightweight aircraft aluminum, this lightweight AR 10 trigger is designed for durability and features a straight trigger bow. 
Additional Features:• Easy installation; utilizes your AR's original hammer and trigger pins• Pull weight can be adjusted without removing the trigger from the lower receiver• Short take-up and glass-rod crisp break with zero over-travel