Aero Precision APCR640437 M4E1 223 5.56 NATO 16" 31-Round Rifle

The Aero Precision APCR640437 M4E1 223 5.56 NATO 16" 31-Round Rifle is a purpose-built carbine designed for tactical operators, law enforcement personnel, and serious sport shooters who demand reliability and modularity in a compact platform. Built on the proven M4E1 receiver set, this rifle delivers the ergonomic controls and quick-handling characteristics that make the AR-15 platform the gold standard in professional and civilian defensive applications.

The 16-inch barrel provides the optimal balance between velocity, maneuverability, and sight radius that has made this configuration the preferred choice for patrol rifles and home defense setups. Aero Precision's enhanced upper and lower receivers feature their proprietary design refinements, including improved tolerances and integrated features that reduce assembly time while maintaining the tight fit critical for sustained accuracy. The 16-inch mid-length gas system optimizes dwell time for reliable cycling with both 5.56 NATO and .223 Remington ammunition, a critical advantage when ammunition availability is unpredictable.

At 8.75 pounds unloaded, the rifle achieves a weight-to-capability ratio that minimizes fatigue during extended operations while maintaining sufficient mass for controllable recoil impulse and sight picture recovery between shots. This platform excels for patrol rifle programs, home defense, 3-gun competition, and recreational shooting where modularity and long-term platform investment matter. The M4E1 receiver set is compatible with standard AR-15 components, making it a versatile choice for various applications.