Upper Receiver Groups

Product Overview and Specifications for Upper Receiver Groups

What is an Upper Receiver Group?

The upper receiver group is a crucial component of AR-15 and similar modular rifles. It includes the upper receiver, barrel, handguard, gas system, and bolt carrier group. This assembly is responsible for housing the moving parts of the firearm and facilitating the firing process.

Key Components

1. Upper Receiver:
   • Material: Typically made from aluminum (7075-T6 or 6061-T6).
   • Type: Can be flat-top with Picatinny rails, or carry handle style.
   • Features: Forward assist, dust cover, brass deflector.
2. Barrel:
   • Material: Chrome-moly steel, stainless steel, or nitrided.
   • Length: Common lengths include 10.5″, 14.5″, 16″, and 20″.
   • Twist Rate: Varies from 1:7 to 1:9, affecting bullet stabilization.
   • Profile: Government, heavy, lightweight, and pencil profiles.
3. Handguard:
   • Type: Free-floating or drop-in.
   • Material: Aluminum, polymer, or carbon fiber.
   • Mounting Systems: M-LOK, KeyMod, or Picatinny.
4. Gas System:
   • Length: Pistol, carbine, mid-length, or rifle.
   • Components: Gas block and gas tube.
5. Bolt Carrier Group (BCG):
   • Material: Carpenter 158 or 9310 steel for the bolt, steel or titanium for the carrier.
   • Finish: Phosphate, nitride, nickel boron, or chrome.
6. Charging Handle:
   • Type: Standard or ambidextrous.

Specifications

• Caliber: Typically 5.56 NATO/.223 Remington, but also available in 300 Blackout, 6.5 Grendel, 7.62x39mm, etc.
• Weight: Varies depending on components and barrel length.
• Finish: Anodized, Cerakote, or other coatings for durability and aesthetics.
• Compatibility: Ensure compatibility with your lower receiver (mil-spec vs. commercial).

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