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  11. CMMG 5.7x28mm Barrel Kit for AR-Platform with Bolt Carrier Group, 16.10 in., 1/2 in. x 28 Thread, Radial Delayed Blowback

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CMMG 5.7x28mm Barrel Kit for AR-Platform with Bolt Carrier Group, 16.10 in., 1/2 in. x 28 Thread, Radial Delayed Blowback

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CMMG 5.7x28mm Barrel Kit for AR-Platform with Bolt Carrier Group, 16.10 in., 1/2 in. x 28 Thread, Radial Delayed Blowback

Item # 609243599

CMMG CMMG 5.7x28mm Barrel Kit for AR-Platform with Bolt Carrier Group, 16.10 in., 1/2 in. x 28 Thread, Radial Delayed Blowback
CMMG CMMG 5.7x28mm Barrel Kit for AR-Platform with Bolt Carrier Group, 16.10 in., 1/2 in. x 28 Thread, Radial Delayed Blowback
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  • New Arrival

CMMG 5.7x28mm Barrel Kit for AR-Platform with Bolt Carrier Group, 16.10 in., 1/2 in. x 28 Thread, Radial Delayed Blowback

Item # 609243599

CMMG CMMG 5.7x28mm Barrel Kit for AR-Platform with Bolt Carrier Group, 16.10 in., 1/2 in. x 28 Thread, Radial Delayed Blowback
CMMG CMMG 5.7x28mm Barrel Kit for AR-Platform with Bolt Carrier Group, 16.10 in., 1/2 in. x 28 Thread, Radial Delayed Blowback

$524.99
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The 16.1 5.7x28mm Barrel and BCG Kit is just the thing for building a carbine length AR in 5.7x28mm using CMMGs patented Radial Delayed Blowback operating system. Unlike typical direct blowback systems, Radial Delayed Blowback not only reduces the weight in your BCG but it results in less felt recoil than a straight blowback system without sacrificing key features like last round bolt hold open. CMMGs 5.7x28mm Barrel and Bolt Kits are designed to be assembled into a Mk4/mil-spec AR15 upper and work with either a CMMG Mk57 lower receiver or Mk4/AR15 mil-spec lower receiver (when using CMMG 5.7 AR Conversion Magazines).

  • 16.1" 5.7x28mm Barrel and BCG Kit is for building a carbine-length AR in 5.7x28mm
  • Uses CMMG's patented Radial Delayed Blowback operating system
  • Compared to typical direct blowback:
  • Reduces weight in the BCG
  • Results in less felt recoil than straight blowback
  • Maintains key feature: last round bolt hold open
  • Kit is designed to assemble into an Mk4/mil-spec AR15 upper
  • Works with either:
  • CMMG Mk57 lower receiver
  • Mk4/AR15 mil-spec lower receiver (requires CMMG 5.7 AR Conversion Magazines)
  • Firearm Fitment: AR-Platform
  • Caliber: 5.7x28mm
  • Color: Black
  • Finish: Salt Bath Nitride
  • Includes: Bolt Carrier Group
  • Length: 16.10"
  • Length Range: 16"-20"
  • Material: 4140 Chromoly Steel
  • Thread Pattern: 1/2"x28
  • Weight: 2.50 lbs
BrandCMMG
Country of OriginMade in USA
Ammunition CapacityN/A
CompatibilityAR-Platform
Gun CompatibilityRifles
Caliber5.7X28mm
Gun Part TypeBarrels
Primary ColorBlack
Product Weight2.50 lb.
Manufacturer Part Number57D0476
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