How (Not) to Install an AR-15 Flat Top Gas Block and Front Sight Base How (Not) to Install an AR-15 Flat Top Gas Block and Front Sight Base How (Not) to Install an AR-15 Flat Top Gas Block and Front Sight Base By Tom McHale|2013-05-22T21:55:19-04:00April 26th, 2013| Well, mostly this is an article about how to install an AR-15 flat-top front sight Read More 20
