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Questions & Answers
What is the thread pitch on the barrel? Expert Answer

The thread pitch on this barrel is 5/8" x 24.

by Armando R., Gear Expert, December 28, 2018
Is this upper a 556 or 300 blackout? The item description says 556 but the features say 300 blackout. Expert Answer

The manufacturer lists this upper receive as 300 Blackout.

by Coyte I., Gear Expert, July 5, 2018

Product Discontinued by Manufacturer

Knight's Armament SR-30 Mod 2 URX 4 M-Lok Upper Receiver Kit has been discontinued by Knight's Armament and is no longer available. Our product experts have helped us select these available replacements below.You can also explore other items in the Gun Parts, AR 15 Parts, Rifle Parts, AR15 Upper Receivers yourself to try and find the perfect replacement for you!

ATTENTION! We currently do not ship this product to P.O. Boxes, AK, CA, CT, DE, HI, MA, NJ, NY, U.S. Territories, or select Colorado locations. Please see our policies for more information or a detailed list of locations.

Product Info for Knight's Armament SR-30 Mod 2 URX 4 M-Lok Upper Receiver Kit

The SR-15 E3 Mod 2 series 5.56 mm 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 5.56 mm 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 Knights line of 5.56 mm QDC Signature Reduction Devices.image

Features/Specifications:

9.5in

1:10 Twist

Cold Hammer Forged Barrel

Chrome Lined

300 Blackout

Package Contents:

  • Knight's Armament SR-30 Mod 2 URX 4 M-Lok Upper Receiver Kit

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Knight's Armament SR-30 Mod 2 URX 4 M-Lok Upper Receiver Kit Unavailable & Discontinued Models

List of Unorderable Models

  • Knight's Armament Upper Receiver Kit, SR-30 Mod 2, 9.5in Barrel, URX 4, M-Lok, Black, 32310 , MPN: 32310 , UPC: 819064016502 , Code: KNA-UFH-ILKTMD-32310
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