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AR15.COM
11/23/2022 10:22:15 AM EDT
I noticed that DD offers the M4A1 in both a carbine and Midlength gas lengths.  What are the +/- of both?  What was the reason behind the change?
Thanks,
- Max
11/23/2022 10:30:20 AM EDT
[#1]
I'm sure more knowledgeable will chime in, but my understanding is the mid length with have a softer recoil impulse than the carbine length.
11/23/2022 10:39:29 AM EDT
[Last Edit: madmaxz06][Edited] [#2]
Roger that, but I wonder if a middy in a 14.5" barrel offers complications that are perhaps not present in a traditional 16" offering?
Often, it seems that the discussion about carbine vs middy is for a 16”, I'm wondering if the calculus changes somewhat in a 14.5"?
Thanks,
- Max
11/23/2022 10:39:37 AM EDT
[#3]
I'm also a fan of the slightly longer handguard.
Every other species kills off their stupid......we cater to them. -- spin-drift
Nobody ever called 911&said I just did something smart. -- TheFlynDutchman
11/23/2022 11:09:05 AM EDT
[#4]
DDM4 M4A1 (RIS II Quad Rail) - Carbine Length - Block II Clone(ish)

DD4 M4A1 RIII (RIS III M-LOK) - Mid-Length - Decided to use same barrels we provide for the URGI.

Both are Good.  Middies shoot softer and reduce wear and tear on the gun.  

Joe Marler
Daniel Defense
Law Enforcement Sales Manager
11/23/2022 12:04:43 PM EDT
[#5]
Good to know, thank you.  The comment about using the same URGI barrels is helpful info.
Happy Thanksgiving,
- Max
1/12/2023 12:01:14 PM EDT
[#6]
Pretty sure the M4A1 RIS-II is only carbine, as the gas block needs to sit in the cut-out of the rail.  The RIS-III, I believe is mid-length.

The RIS-3 line looks rather attractive, but DD should not call this a M4A1 rifle.  Just like Geissele should not call their URGI upper receiver group a URGI.  Both are commercial variants of a military rifle, but DD and Geissele have move so far beyond what an M4A1 or a URGI is that the nomenclature is worn out.
Devon

I am forbidden to endorse certain manufacturers or vendors on this forum, so nothing herein should be taken as an endorsement. All views are my own, and I am here as a contributor, learner and collaborator only.
2/3/2023 2:29:41 PM EDT
[#7]
Quote History
Originally Posted By barrelnutz:
Pretty sure the M4A1 RIS-II is only carbine, as the gas block needs to sit in the cut-out of the rail.  The RIS-III, I believe is mid-length.
View Quote View All Quotes
View All Quotes
Quote History
Originally Posted By barrelnutz:
Pretty sure the M4A1 RIS-II is only carbine, as the gas block needs to sit in the cut-out of the rail.  The RIS-III, I believe is mid-length.




Originally Posted By Marler5811:
DDM4 M4A1 (RIS II Quad Rail) - Carbine Length - Block II Clone(ish)

DD4 M4A1 RIII (RIS III M-LOK) - Mid-Length - Decided to use same barrels we provide for the URGI.





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