Brownells DIY AR-15 Performance Upgrade Installation

Shoot your AR-15 better with this performance upgrade DIY kit from Brownells. For more information please visit

3 thoughts on “Brownells DIY AR-15 Performance Upgrade Installation”

  1. Might be a little late on this, but it is to take out the play between the upper and lower receivers. Which in turn is supposed to give you a little extra accuracy.

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