This video demonstrates a simple, low-cost modification known as 'The Quarter Trick' for AR-15 firearms equipped with .22 conversion kits. The technique involves using a US quarter as a shim within the buffer tube to reduce play in the bolt carrier group, which can often lead to feeding issues with .22LR ammunition due to manufacturing tolerances in milspec AR-15 receivers. This fix aims to improve the reliability of .22 conversion kits by ensuring proper alignment and movement of the BCG.
This video explores the necessity and function of the AR-15's forward assist. It details the historical context of its addition to the M16 during the Vietnam War due to reliability issues with early models and ammunition. The guide outlines the US Army's SPORTS drill, emphasizing the 'Tap' step which utilizes the forward assist to ensure the bolt is fully in battery after a reload, a critical step for maintaining combat readiness.
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