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[ARCHIVED THREAD] - DD Barrel Extensions?

Posted: 6/20/2010 10:21:01 PM EDT

Could someone clarify for me whether or not DD barrels use barrel extensions with extended feedramps - commonly known as "M4" barrel extensions?

I'd assumed at first that DD would, however, looking at the descriptions both on DD's and Bravo Company's websites, I see the barrel extensions listed as "A4," which for the time being, I can only equate to the M16A4 which has rifle (non-extended) feedramps.

Can someone clarify this for me?

Thanks,
~Augee

Posted: 6/21/2010 7:05:48 AM EDT

[#1]

I ordered the 16" 1:9 M4 from BCM and it has the feed ramps.

Posted: 6/21/2010 1:03:01 PM EDT

[#2]

All of our barrels use A4 barrel extensions which have the enhanced feed ramps.

Posted: 6/21/2010 4:38:15 PM EDT

[#3]

They are M4 ramps, or they are at least close to being M4 ramps.

It was hard to get the camera to focus on the ramps.
Dustin

Posted: 6/21/2010 5:23:14 PM EDT

[#4]

Thanks,

I've got a DD 10.3" barrel with a RIS II, but I wasn't able to check it, but I coulda sworn that it had M4 ramps until everything I saw said "A4" extension!

It seemed odd to me considering I installed it on a Colt M4 upper which has extended ramps, I would have expected more problems.

Could you explain to me where the nomenclature "A4" extension came from versus "M4" extension? I only ask because it confused the heck out of me, as the military's M16A4 does not use an extended feedramp barrel extension, which is typically what I associate "A4" unless it is otherwise noted.

Thanks again,

~Augee

[ARCHIVED THREAD] - DD Barrel Extensions?

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[ARCHIVED THREAD] - DD Barrel Extensions?

[ARCHIVED THREAD] - DD Barrel Extensions?