Every M4A1 made before 2000 has a govt profile barrel.
The SOCOM weight barrel came out in 2000.
All M4s and M4A1s are flattop.
If you were building an M4A1 now using 2008 parts, you would need a SOCOM weight barrel.
A gun that looks like an M4 but with a fixed A2 carry handle is Colt model 727 and is not a standard US military weapon.
what do you mean using 2008 parts?? were parts different then in 2000?
Im just doing the replica of an m4 or m4a1. I know the lower reciever isn’t right since it’s from an m16a1 and not from an a2.
upper is DD… which is not right but probably close enough. rails of course is not right DD wasn’t probably making rails at that time. and the barrel is a CMMG govt. CMMG I assume never made barrels for the military.
Every other part is the same.
Not to be contrary but you must have meant “not a standard US Army weapon.” We have the GUU-5/P.
Oh contrare,
1SFG had that specific config in an M4 in the late 90’s
the guu rifle is not an m4. since it has an a1 uppper reciever
Yeah It is the 1st M4s came with A1 uppers with m4 feed cuts.
And as far as A2’s I remember see US Property marked Receivers that were marked M16A2/M4 M4 barrel A2 upper DOS had a bunch of them.
Second whats up Kev U home for good?
but the GUU still used the pencil barrel with 1/12 twist. did they really have the m4 feed ramps??
I thought it was the m16a2 carbines that had the m4 feedramps.
I don’t think that website applies. the USAF rebuilt rifles. They were never designated as M4 or M4A1 rifle.
Actually there were no “exact” specs to the GUU/GAU weapons. They are still floating around in a number of combinations. Parts, including barrel, were replaced as needed with what was on hand. Believe it or not I have not come across any current pubs addressing the use of an ‘F’ height FSB with any replacement barrels, if current M4 profile is used. Our last 4 GAU’s went to Depot/DRMO/Big AF about 6 months ago despite my numbered written protests/requests to keep them on hand for training purposes. They were our Raven guns and got replaced with standard M4’s. They got shipped with the old M870’s when replaced by the M870MCS.
I’m not really sure why the link wouldn’t “qualify”, but the link backs up sgtred’s point that there was indeed a military rifle issued with the M4 barrel and A1/A2 type upper. May not have been called M4 or issued to the Army, but it exists. I pointed to it to show that not all of the GUU rifles have 1/12 twist pencil barrels, some are indeed step cut.
Kevin,
I’m not going to rehash this topic with you on what defines an official US military weapon.
You have haggled myself and other experts on this and have been proven wrong every time.
Incorrect.
Scott - the difference is when I have handled said gun in question and fired it on a qual - you may have a book that says this and that. However I am here to explain that what happens in the world - may be different that your book.
I think an m4 barrel isn’t what makes an m4.
Rifles that were desginated as m4 or m4a1 is the topic.
were these rifles designated as m4? or m4a1?
what if the usaf rebarelled them with shilen barrels?
Can you say that m4 comes in shilen barrel?
What if usaf used the vltor upper. can you say that m4 comes in vltor upper?
There is no book that has any of this in it.
A M4 or M4A1 lower that is property marked with a fixed carry handle is not a M4 or M4A1. It is a mutt.
A lower that is marked M16A2 and has a fixed carry handle with M4 style barrel is a Colt 727. It is not an official US military weapon. I never said it was never used by the military as the Army and Navy both purchased these through commercial channels in 1989 and 1991.
This topic is very specific to what the OP is asking and your comments are not welcome. They are clouding the issue.
The OP is asking was makes a standard, factory, and official US military weapon.
I had 3 different Marines tell me how much an M16A2 rifle weighs last week. All 3 of them gave me different incorrect answers, but since they are in the “real world” I guess they are correct.:rolleyes:
scottryan,
Thanks scott. You got what I was asking…
I wanted to know what is the specs of the weapon the military designated as m4 or m4a1. I assume m4a1 has some improvements to m4.
Designated is the word I used since it is the military the designated the name “m4” or “m4a1”. Not colt designations or other company designations.
Thanks