Silly question, but is a standard x39 barrel the same externally as a A2? I would like a 16" midlength x39 barrel to use with a 16" A2 birdcage and A2 front sight with perhaps an A1 sight post. I've read that some x39 barrels are 1/2" threaded for muzzle devices and some are 5/8", while standard 556 is 1/2".

 

I'm looking to build a PA carbine. x39, MOE furniture, 16", bayonet mountable. I would consider 5.45 over 7.62 if 7n6 was still being imported.

not positive about the profile but i have gotten all my x39 parts at ardepot.com and sotaarms.com

 

you can always contact them first

Aren't you going to end up with an odd trajectory vs. point of aim?

Aren't you going to end up with an odd trajectory vs. point of aim?

Probably.

 

I believe a scope would be overkill and I like iron sights anyway. I really don't know what sights to use, but since I live in PA I would like it to be bayonet mountable with an A2 fsb.

i was nailing steel at 200 2 weeks ago with my x39 standing. trajectory didnt seem all that off

 

i was nailing steel at 200 2 weeks ago with my x39 standing. trajectory didnt seem all that off

 

 

You have AR-15 A2 front sight on it?

 

Trajectory doesn't mean accuracy. Most MSRs have sights of a specific height that allows them to shoot relatively flat over a given range (point-blank range). You change that height and you have to adjust elevation of point of aim over the point blank range.

  

 

You have AR-15 A2 front sight on it?

 

Trajectory doesn't mean accuracy. Most MSRs have sights of a specific height that allows them to shoot relatively flat over a given range (point-blank range). You change that height and you have to adjust elevation of point of aim over the point blank range.

Front sight folded down, primary arms red dot only. Was zeroed at 100. Im not very experienced with sighting things in yet so I was kind of just "Seeing if I could hit it." Was a 12×20 plate so not to difficult anyway. The bullet did not seem to drop between 100 and 200