Review of Elftmann Tactical drop-in AR-15 ELF trigger by Jeremy from Truth About Guns. The ELF Drop-In Match Trigger has been built for performance. Watch as the trigger reset and travel is tested in detail, the ELF Trigger for AR-15 rifle outperforms all expectations.  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. A second-to-none AR- 15 drop-in trigger system that is strong and light, made of wire EDM machined, hardened A2 tool steel and lightweight aircraft-grade aluminum. Installation can be done in minutes using your AR’s original hammer and trigger pins. The match trigger may be ordered with a curved or straight shoe.