Cutting 6920 barrel

[Walker_Texasranger]

I know this is a common topic but I’m sending a 6920 upper to ADCO to cut to 14.7”. Should I add a step to it like the factory barrel in 16” configuration or no? I guess it’s jusg a cosmetic thing unless running certain muzzle devices?

[Interrupt]

I know this isn't what you're asking, but you might consider Specialized Armament Warehouse for cutting down your barrel. They've done all the barrel work on my Colts and they do an amazing job.

[vicious_cb]

I know this is a common topic but I’m sending a 6920 upper to ADCO to cut to 14.7”. Should I add a step to it like the factory barrel in 16” configuration or no? I guess it’s jusg a cosmetic thing unless running certain muzzle devices?

You cut that barrel!

#OneLess

[Walker_Texasranger]

Alcohol is a hell of a drug.

Are you referring to the m4 cut?

No. I’m referring to the step in the barrel right after the muzzle device. If you cut the barrel it’ll cut off that step. However, they can reprofile the barrel if you want and add that step back.

ETA: I guess that is the M4 cut?

Double tap.

[Matt45648]

Are you referring to the m4 cut?

[MegademiC]

Now that you bring it up, anyone know why that step is there?

[HeruMew]

I've seen some youtube videos lately where an angle grinder and chop saw worked well.

Best news is, you can put the barrel/upper on a rifle lower, and as long as you say you'r doing the recording for the Childrunz, you won't have any trouble...

In all seriousness, it's not needed. I believe the M4 cutouts were all for mounting M203s; however, I am far from the SME on this topic..

[EChryst]

M4 Cutouts are absolutely for mounting M203s
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[Walker_Texasranger]

That’s not what we are talking about. Do you see how in that pic the barrel is slightly thinner right after the muzzle device? Here.

https://adcofirearms.com/shop/gunsmi...0-muzzle-step/

[MistWolf]

The step serves no practical purpose.