ar barrel drilling

[tom_12]

Hi I'm building my first ar. I have one question to ask. Do I need to drill holes for the front sight post on this barrel

http://www.gmriflebarrel.com/gm-m15-m16-a1-5-56mm-20-1-12-twist-20-barrel/

[maxx03]

Tom, the barrel comes drilled for the gas block which can also be used as a gas block/sight like an a2 sight. if you're planning on free floating, then the post can be mounted onto the hand guard.

[tom_12]

Tom, the barrel comes drilled for the gas block which can also be used as a gas block/sight like an a2 sight. if you're planning on free floating, then the post can be mounted onto the hand guard.

thanks for the help

[Awesomesauce]

Gas port should already be drilled.
If you want to use USGI pinned front sights, yes, you will have the relief cuts for the pins drilled by a skilled gunsmith.
However there are tons of sights on the market that don't require pins, they basically clamp on with bolts.

[kendog4570]

I can pin it for you. If I have your upper with rear sight installed, barrel, barrel nut, and front sight post I can align and pin them to within 1/2 MOA of your mechanical wind zero.

[tom_12]

I can pin it for you. If I have your upper with rear sight installed, barrel, barrel nut, and front sight post I can align and pin them to within 1/2 MOA of your mechanical wind zero.

cool I'll keep that mind.
btw I'm building a m16a1 retro clone.