B brmfan New member Oct 23, 2012 #1 To rebarell a M4 proflile AR carbine to a 16" 300 BLK, will the A2 front sight base need to be replaced or can it be used?
To rebarell a M4 proflile AR carbine to a 16" 300 BLK, will the A2 front sight base need to be replaced or can it be used?