Sons of Liberty Gun Works L89 V2 Complete Upper Receiver 556NATO 12.5″ Button-Rifled Barrel A2 Flash Hider Low Profile Gas Block Black

Sons of Liberty Gun Works L89 V2 Complete Upper Receiver 556NATO 12.5″ Button-Rifled Barrel A2 Flash Hider Low Profile Gas Block Black. This system clamps the rail onto the steel barrel nut with extreme force and precision while also driving the handguard rearward towards the upper receiver. The slightly larger ID of that extrusion gives you more real estate around the gas block even more rigidity than the M76 and takes longer to heat. Specifications for Sons of Liberty Gun Works L89 V2 5.56x45mm NATO 16.5 inch Upper Receiver: Manufacturer: Sons of Liberty Gun Works Caliber: 5.56x45mm NATO Barrel Length: 16.5 in Barrel Profile: 4150 Chrome Moly Steel Muzzle Device: A2 Flash Hider Finish: Black Color: Black Gun Model: Sons of Liberty M4-L89 Fabric/Material: Steel Gun Rail: M-LOK Gun Type: Rifle Gun Make: Sons of Liberty Gun Works Bolt Carrier Group Included: No Charging Handle Included: No Included Accessories: A2 Flash Hider Rifling Profile: Button Rifling Package Contents: Sons of Liberty Gun Works L89 V2 5.56x45mm NATO 16.5 inch Upper Receiver What firearm models does the manufacturer say Sons of Liberty Gun Works L89 V2 5.56x45mm NATO 16.5 inch Upper Receiver is compatible with? The manufacturer suggests that Sons of Liberty Gun Works L89 V2 5.56x45mm NATO 16.5 inch Upper Receiver is compatible with Sons of Liberty M4-L89Sons of Liberty Gun Works M4L89UPPER-12.5-556: L89 V2 Complete Upper Receiver 556NATO 12.5″ Button-Rifled Barrel A2 Flash Hider Low Profile Gas Block Black