Knights Armament (KAC)
This is Knights flagship upper receiver for the AR15 SR-15 platform. Years of research and development. Expensive, yes. Hard to find, yes, yes !! Build like a tank, yes, yes, yes !!! Do you need this? No. Do you drool all over it and want it on top of your performance lower, you bet you do.
The SR-15 E3 Mod 2 series’ 5.56mm NATO barrel is manufactured for military grade durability, and is free-floated inside a URX4 M-LOK handguard. An improved E3 round-lug bolt design both enhances function and increases bolt life far beyond the industry standard. The 5.56mm 3-Prong Flash Eliminator interferes with propellant gas combustion forward of the muzzle to significantly reduce flash signature, will not ring upon firing or when struck, and is compatible with the Knight’s line of 5.56mm QDC Signature Reduction Devices.