Upper Receiver Assembly 223 Gen 4, Black, 9" M.R.R.
- 10.5" - Weight: 4.7 lbs - Overall Length: 17.75" - Match grade barrels fluted to reduce weight and dissipate heat. - 4150 Mil-B-11595E chromoly alloy. - Corrosion resistant nitride heat-treated 1:8. - POF-USA triple-port muzzle devices. - POF-USA oversized heat-sink barrel nut. - 5.56x45 mm NATO (.223 Remington) chamber. - E dual-extraction chamber technology (GEN 4 ONLY).
Method of Operation:
- Semi-auto (P415) or full-auto select-fire (P416) rotating bolt, short-stroke gas piston system. - Corrosion resistant nitride heat-treated gas piston system consisting of a single piece gas block, gas plug, gas piston, and operating rod. - Multi-position regulating gas system with normal, suppressed, and bolt-action (off) operating modes.
Bolt & Carrier:
- Nickel plated bolt carrier with integrated bolt carrier key. - POF-USA roller cam pin with chrome plated stem and NP3 roller. - Chrome plated bolt.