Description

The PSA AR‑15 5.56 NATO is a semi‑automatic modern sporting rifle built on the classic AR‑15 platform and chambered for 5.56×45 mm NATO. Known for its modular design, Mil‑Spec components, and compatibility with a wide range of parts and accessories, this rifle is suited for range shooting, defense, and general‑purpose use. Typical PSA configurations feature a 16″ nitride‑treated barrel, forged aluminum receivers, and an adjustable stock.

Specifications

• Manufacturer: Palmetto State Armory (PSA)
• Model: AR‑15 5.56 NATO (varies by configuration)
• Caliber: 5.56×45 mm NATO (5.56 NATO)
• Action: Semi‑automatic, direct impingement AR‑15 design
• Barrel Length: Typically 16″ (common configuration)
• Barrel Material: 4150V Chrome Moly Vanadium steel
• Barrel Finish: Nitride (corrosion and wear resistant)
• Barrel Profile: M4 taper/profile
• Twist Rate: 1 in 7″ (stabilizes a wide range of bullet weights)
• Gas System: Carbine‑length (typical) or mid‑length depending on variant
• Gas Block: Low‑profile F‑marked front sight base or low gas block
• Upper Receiver: Forged 7075‑T6 aluminum, flat top with feed ramps
• Lower Receiver: Forged 7075‑T6 aluminum, hard‑coat anodized
• Bolt Material: Carpenter 158 steel
• Bolt Carrier: 8620 steel, chrome‑lined (in many PSA builds)
• Fire Control Group: Mil‑Spec single‑stage trigger
• Handguard: PSA 13.5″ lightweight M‑LOK free‑float rail (typical)
• Stock: Adjustable 6‑position carbine buffer tube with collapsible stock
• Sights: Often includes backup iron sights (varies by build)
• Magazine: Typically 30‑round detachable box magazine (varies by jurisdiction)
• Muzzle Thread: 1/2″‑28 TPI for muzzle devices (common)
• Overall Length: Approx. 32″ (configured with 16″ barrel)
• Weight: ~6.5–7 lb unloaded (varies)
• Distinctive Features:
  • Modular AR‑15 architecture (wide parts compatibility)
  • Forged Mil‑Spec receivers for durability
  • Free‑float M‑LOK handguard for accessory mounting
  • Nitride barrel for corrosion resistance.