The ELF Drop-In Single Stage Match Trigger has been built for performance. The only AR-15 trigger using aerospace grade sealed bearings, making for an incredibly smooth and fast trigger pull. Pull weight is so easy to adjust it can be done in seconds without removing the trigger from your lower receiver. It fits any mil-spec AR-15, and is designed to be absolutely drop-safe regardless of pull-weight. The Factory set pull-weight is approximately 50% lighter than that of a standard AR-15 trigger to provide great speed and accuracy. It is adjustable from 4 lbs. to 2 3/4 lbs. without removing it from lower, and installation uses existing hammer & trigger pins. It’s very short pull and reset allows for rapid follow up shots and greater accuracy. The unique design of the disconnector offers a full 1/4” width surface to eliminate the possibility of wear and double-firing. High performance trigger and hammer needle bearings make for smoother and faster firing. Sturdy, rugged, and trouble-free – machined of lightweight aircraft-grade aluminum and hardened steel – 100% made in America with a Lifetime Guarantee. How to Install