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Barrel Extension with M4 Feed Ramps

Barrel Extension with M4 Feed Ramps

  • 2677


Making your own barrel? Changing your feed ramps? Changing the caliber and chamber in some way? Well if this is the case, you might need a new barrel extension. Very hard to find these in Canada.

  • Hardened metal construction
  • Ground finish for high precision
  • Mil-spec
  • M4 feedramp profile
  • Weight: 48g
  • Dimensions: 28mm long × Ø29.7mm rim diameter × Ø25.4mm body diameter

You get:

  1. One barrel extension 

Compatible with:

  • All mil-spec AR15 barrels 
  • All mil-spec uppers

Installation Difficulty:

Tools required: Head space gauges, barrel extension tool torque wrench, file, possibly a chamber reamer

Installation notes: This is not for the faint of heart. You need to align the feed-ramps to the gas port and attain correct chamber length all at the same time. This means lots of hand fitting, filing, sweating, swearing and beer. I cheat and machine a new gas port once the chamber is sorted to remove one variable at the cost of a lot of repairing.