This video provides a step-by-step guide on how to install the bolt catch roll pin on an AR-15 lower receiver. It highlights the use of specialized tools like the Real Avid roll pin starter and punch, which simplify the process and help prevent marring the receiver. The instructor demonstrates the correct technique for driving the pin flush, ensuring proper function of the bolt catch.
This video from Brownells Gun Tech™ provides a quick tip on identifying AR-15 trigger springs, specifically distinguishing the disconnector spring from the bolt catch spring. Host Caleb Savant explains that these springs are not interchangeable and details a key visual difference: the disconnector spring has a flared end that fits into the trigger. He emphasizes that installing the wrong spring will lead to malfunctions in either the disconnector or the bolt catch, offering a practical solution to avoid common building errors.
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