There is no one-size-fits-all answer to this question, as the length of an AR-15 lower receiver can vary depending on the specific make and model of the rifle. However, most AR 15 lower receivers are generally between 7 and 9 inches in length. So, if you’re wondering how long an AR-15 lower receiver is, chances are it’s somewhere in that range.
Johnny Answered question August 28, 2022