A billet lower is a lower receiver for AR-15 or AR-10 rifles, precision-machined from a solid block (billet) of aluminum, offering enhanced strength, unique styling, and tighter tolerances compared to forged lowers. It works with AR-15 or AR-10 upper receivers, lower parts kits, buffer tubes, stocks, magazines, and other standard components. Billet lowers are popular for custom builds, upgrades, or those seeking improved aesthetics and durability in hunting, target shooting, or tactical rifle platforms.
