Please stop with this cheap garbage.... Are you serious with this upper?!

Published on January 21, 2018
Duration: 3:20

This video provides a critical assessment of the Bushmaster Carbon 15 polymer upper receiver, highlighting significant design flaws and safety concerns. Instructor Chris from Regular Guy Training LLC demonstrates the flex and potential failure points of the polymer construction, particularly where a bolted-on metal Picatinny rail is attached. The assessment concludes that polymer uppers are inherently unsafe due to the stresses they endure, recommending against their use.

Quick Summary

Polymer AR-15 upper receivers, like the Bushmaster Carbon 15, are considered unsafe due to the high operational stresses they endure. A critical flaw involves metal Picatinny rails bolted to polymer, leading to stripped threads and separation. Experts recommend aluminum uppers for safety and reliability.

Chapters

  1. 00:00Introduction to Budget Builds
  2. 00:42Bushmaster Carbon 15 Overview
  3. 01:29Structural Integrity Issues
  4. 02:20Safety Warning and Conclusion

Frequently Asked Questions

Why is a polymer AR-15 upper receiver considered unsafe?

Polymer upper receivers are deemed unsafe because they endure significantly higher stress loads during firing and cycling compared to polymer lower receivers. This increased stress can lead to material fatigue, flex, and potential catastrophic failure, posing a serious safety risk.

What specific flaw was identified in the Bushmaster Carbon 15 upper receiver?

The primary flaw identified in the Bushmaster Carbon 15 upper receiver is its polymer construction combined with a metal Picatinny rail bolted directly onto the polymer. This attachment method is prone to stripping and separation due to the stresses involved.

What material is recommended for AR-15 upper receivers instead of polymer?

Firearm experts strongly recommend using traditional materials like forged or billet aluminum for AR-15 upper receivers. Aluminum offers superior strength, durability, and reliability under the high operational stresses experienced by this component.

What are the risks associated with using a polymer upper receiver?

The risks include potential structural failure during firing, which could lead to malfunctions, damage to the firearm, and severe injury to the shooter or bystanders. The flex and separation observed in polymer uppers highlight these dangers.

Related News

All News →

More Tactical & Gear Videos You Might Like

More from Regular Guy Training LLC

View all →