11.5 inch Colt model 733 / M4 Commando / XM177E2 barrel - (.750)

$115.00 - $225.00
(No reviews yet) Write a Review
SKU:
115barrel875p

This is a very affordable option for all 11.5' ish models (XM177E2, Commando, etc.).

Before 1967, all SMG sized AR15 models were 10 inches. In early 1967 The US Military decided to increase the length to 11.5 inches since it reduced flash and blast, and increased both reliability and velocity. This stayed the same for all Colt Commando Models up until the use of the Mk18 in the 2000's.

Unlined and phosphate coated means this barrel's individual strengths are accuracy, lower cost. Same external finish used on US military barrels.

Why choose this barrel?

  • Good for all 11.5" builds
  • Lower cost
  • Phosphate, not Nitride coated
  • 1:8 Twist, which many folks prefer
  • Light Weight: 1.2 lbs
  • Your SBR form already details a 10.5" barrel length, and you want to maximize inherent accuracy

 

Specifications:

  • 11.5 inch, 4150 Barrel
  • 1:8 Twist
  • M4 Feed Ramps
  • Phosphate Finish
  • M4 profile (.750)

 

Full Assembly Specifications:

  • 11.5 inch, 4150 Barrel
  • 1:8 Twist
  • M4 Feed Ramps
  • Phosphate Finish
  • M4 profile (.750)
  • Tapper pinned FSB
  • A1 Round Front Sight Post
  • Early Flat Style Straight "Slip Ring" (not Delta Ring)
  • 4.25" Moderator with Grenade ring (not pinned, removable)
  • Gas Tube & Pin
  • Barrel Shim (just in case it is needed for Barrel Nut timing, taper pins do not need to be removed to install)

**Note: Full Assembly will take 4 to 6 weeks to ship from order date