Removing a stuck Daniel Defense muzzle device

[0liver]

I'm new to the AR world and now hitting a wall. I can't get the muzzle device off my Daniel Defense DDM4V7.
I really want to DIY this instead of paying a gunsmith, but this thing is on there tight. Is there a trick to Daniel Defense builds? Do I need to hit it with some heat, or is it just a matter of more leverage?

Any tips on how to break it loose without marring the barrel would be awesome!

 

[Alan]

DD usually cranks those on pretty tight, so nope.. not crazy. Make sure the upper is locked into a vise with a proper reaction rod or vise block first—thats key. Then use a solid armorer's wrench and give it steady pressure with a longer handle for leverage instead of trying to jerk it loose. If it still wont move, a little heat from a heat gun should help loosen any thread locker. Don't torch it,, just warm it up and try again. Once it breaks free, it'll spin right off

 

[morningC0fee]

To swap a muzzle device on your DD, you really just need a bench vise, an upper receiver rod (like a Midwest Industries URR or a Geissele Reaction Rod), and an armorer’s wrench.
If you're in a pinch, a large adjustable crescent wrench works for the flash hider flats. just wrap the device in some electrical tape or a cloth first to avoid marring the finish.

Check out this Brownells video for a solid step by step

 

[red5ky]

If you have a vise, an armorer's tool, and something to hold the upper, you have what is needed to swap out a muzzle device.
You also could also use an adjustable wrench to get the flash hider off

 

[Alan]

If you have a vise, an armorer's tool, and something to hold the upper, you have what is needed to swap out a muzzle device.
You also could also use an adjustable wrench to get the flash hider off