The NBS Nickel Teflon AR15 Trigger Kit is 100% made in the USA and is designed to reduce friction and increase smoothness over standard mil-spec triggers. The nickel teflon coating also provides enhanced durability and corrosion resistance. Engagement surfaces on trigger and hammer are precision polished to give you a crisp trigger pull. This kit will work with any mil-spec AR15 lower receiver. Trigger pull weight is approximately 6 pounds. All Tom's Tactical brand products include a lifetime warranty.Features: Nickel Teflon Trigger & Hammer Enhanced Durability and Lubricity Smooth trigger pull Works with any mil-spec AR15 lower receiver Made In USA Lifetime WarrantyParts Included: Nickel Teflon Trigger Nickel Teflon Hammer Disconnector Disconnector Spring Hammer Pin Trigger Pin Hammer Spring Trigger Spring