If you get a barrel that isn't threaded (i.e. the M&P 15 Sport http://www.smith-wesson.com/webapp/wcs/stores/servlet/Product4_750001_750051_785513_-1_757785_757784_757784_ProductDisplayErrorView_Y) does the pinned & welded muzzle break/comp rule still apply?

 

I don't mind getting a nice comp put on the end, but it seems to me this part of the law wouldn't apply in this instance since I can't just go put an evil flash hider on it.

Since it is not a threaded barrel or a flash suppressor than no, you dont need to pin anything (especially since there isn't anything to pin or weld?)

Its referred to as a bull barrel, they do not need anything attached to them. Only barrels with threads have to have a comp on it and it has to be pinned and welded.

Good luck finding a muzzle device with the exact diameter as your barrel. I do not think there is one.

 

Unless you want someone to completely disassemble your rifle, turn down the barrel to the correct size, thread the barrel, then pin and weld a muzzle device, I would stick with what you have, a crowned barrel.

Good luck finding a muzzle device with the exact diameter as your barrel. I do not think there is one.

 

Unless you want someone to completely disassemble your rifle, turn down the barrel to the correct size, thread the barrel, then pin and weld a muzzle device, I would stick with what you have, a crowned barrel.

 

during the federal ban, most everyone turned the front part of their barrel to a specific diameter unless it was a bull barrel. There were muzzle devices that fit on and you would rill detents for set screws. I have such a setup.

during the federal ban, most everyone turned the front part of their barrel to a specific diameter unless it was a bull barrel. There were muzzle devices that fit on and you would rill detents for set screws. I have such a setup.

"most" ?

 

Olympic Arms, yes. What do you have?

"most" ?Olympic Arms, yes. What do you have?

Only had a notch pre cut the whole radius so nothing but some locktite was needed Mine was a bushmaster. I had to grind in flats for the set screws, but it was the right diameter for a set screw smith comp. Also fit just fine on an fn barrel and a rock river.

I just bought a mp15 sport, can i change just the barrel ? sorry for the noob question

I just bought a mp15 sport, can i change just the barrel ? sorry for the noob question

Yes, you can. Barrels are sold separately from plenty of vendors out there on the interwebz.

 

ETA: for example: http://www.bravocompanyusa.com/AR15-M16-M4-Barrel-Assemblies-s/3.htm