AR's being hacked up by "Gunsmiths"

Published on November 29, 2024
Duration: 2:40

Improper AR-15 gunsmithing can ruin expensive components. Grinding aluminum feed ramps, like M4 style on Mega Arms MKM/MML uppers, removes hard anodizing, leading to rapid wear. Always vet gunsmiths carefully, as even minor errors can cause feeding issues. A cotton swab test can reveal sharp edges indicating poor ramp blending.

Quick Summary

Grinding aluminum AR-15 feed ramps, like M4 style, removes hard anodizing, causing rapid wear and failure. Check for poor blending with a cotton swab test; sharp edges indicate issues that can lead to feeding problems and damage expensive components.

Chapters

  1. 00:00Intro: Beware of Bad AR Gunsmiths
  2. 00:24Mistake 1: Ruined M4 Feed Ramps
  3. 01:32Mistake 2: Poor Blending & Feeding Issues
  4. 02:23Conclusion: Vet Your Gunsmith

Frequently Asked Questions

What is a common mistake when gunsmithing AR-15 feed ramps?

A frequent error involves grinding the aluminum feed ramps of the upper receiver, such as M4 style ramps, to blend them with steel barrel extensions. This process removes the protective hard anodizing, leading to accelerated wear and potential component failure.

How can I check for poor feed ramp blending on my AR-15?

A simple cotton swab test can reveal issues. Gently run a cotton swab along the junction of the barrel extension and the upper receiver's feed ramps. If the swab catches on a sharp edge or burr, it indicates improper blending that could cause feeding problems.

Why is proper AR-15 feed ramp blending important?

Properly blended feed ramps ensure smooth feeding of cartridges from the magazine into the chamber. Poor blending creates sharp edges that can snag ammunition, leading to malfunctions. It also preserves the hard anodizing on aluminum receivers, preventing premature wear.

Can damaged AR-15 feed ramps be repaired?

Yes, minor damage from poor blending can often be repaired by a skilled gunsmith, provided the aluminum hasn't been excessively ground away. However, significant damage might necessitate replacing the upper receiver or barrel extension.

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