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













