I'm about to change out a barrel on my A3 (flat top) upper.  Actually I'm changing out the upper, but that's not the issue.  Which upper receiver fixture is going to work best for this?  I struggled through using a barrel vice in my first build, and you will always see where I held that barrel because of it, so I'm not going that way this time.

It looks like I have a choice between ADCO's, DPMS's and Model 1's fixtures.  Which is smoother and easier to use?  What else might I need to have to make either of them work for me?

I use the Bushmaster clamshell, it works great.

Quoted: I use the Bushmaster clamshell, it works great.

I'll have to look for that on their site.  Is it different from the M1S device?

ETA: Why yes it IS different.  This one looks way better than the M1S fixture...

Anyone have experience with the ADCO or DPMS fixtures?

Panther claw. I don't even know where to find the aluminum vice jaws anymore. A+