Is this barrel extension / mock suppressor idea legal?

I’m building my younger brother a .22LR copy of the suppressed CAR15 used in the movie Black Hawk Down.

Base gun is a SW .22LR AR15 clone, and I built up a sort of barrel shroud / barrel extension thing to give it that mock-suppressor look. However, I want to make sure first that it wont be construed as an actual suppressor.

I included a rudimentary paint mock up, but basically the mock suppressor is a plastic tube that runs the length of the barrel and sticks out about 2 inches past the flash hider. There is NO ENDCAP of any sort, its simply open at the end, much like the Noveske KX3 type flash hiders. It doesnt make a difference in terms of noise at all, but I just wanted to be sure of the legality of this first.

Any thoughts?

Again, the tube is OPEN at the end, no constraining end cap or anything. There is about 2-2.5inches of open tube between the flash hider/barrel and the end of the tube.

Google is your friend.

Legal so long as you do not include it in your barrel’s length to get to 16" (unless it is permanently attached per ATF rules).

http://www.google.com/search?q=fake+surpressor&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a

Buckaroo

Right, Ive seen those. Mock suppressors that thread onto the end of a barrel are required by the ATF to have a solid core.

The idea in question is a little different though. It doesnt thread onto the END of the barrel, it slides all the way OVER the barrel, except for the last 2-3 inches that hang out beyond the flash hider. Does that make sense?

Wouldnt it be classified similar as a Noveske KX3?

Thats kind of what I was thinking, just wanting to make sure, especially since the gun/project is a gift for my brother, I’d hate to be giving him something that was less than legal…

KX3 threads onto the end of the barrel so maybe not. Call ATF and ask?

I guess the similar aspect that Im thinking of is that they both involve an open “cup” of sorts at the end of the barrel. I may have to but calling them up is last resort, I’m running it by the forums first.

Is it designed or intended to be used as a suppressor? -.-

They only have one ruling on suppressors related to paintball guns. http://www.atf.gov/regulations-rulings/rulings/atf-rulings/atf-ruling-2005-4.pdf