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Posted: 10/16/2009 9:35:16 AM EDT
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alright i am currently putting my ducks in a line for my first new AR build but had a somewhat easy question for veterans out there, i am looking at an M4 Style carbine but i see there is and M4 16" carbine length and an M4 16 Mid Length, is the only difference between these two is the fixed muzzle break with a 14.5 barrel vs a 16" barrel without a fixed muzzle break? is the gas block positioned differently, obviously if its 14.5 with muzzle break to achieve the 16" the gas block would be closure correct and thus would need a shorter gas tube? If i can get any insight on this issue it would be greatly appreciated, i would prefer a rifle without a fixed Muzzle break for more options. Thanks
i would hate to buy a barrel and have it not fit other components if i end up buying and assemblying seperate parts verses the options below as well. and if anyone has any suggestions on which would be a better option i am open for suggestions. also here is what i was looking at, couldn't seem to see what the difference was between the 2: http://www.bravocompanyusa.com/ProductDetails.asp?ProductCode=BCM%2DURG%2DM4%2D16&Show=ExtInfo http://www.bravocompanyusa.com/BCM-BFH-16-Mid-Length-Upper-Receiver-Group-p/bcm-urg-mid-16%20bfh.htm  Ryan
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I re read your post several times and think you are confusing two different things.
The two you posted both have a 16" barrel with a screw on A2 flashider. With the screw on FH they would appear to be 18", but only 16" for legal purposes. Mid length and carbine length only refers to the gas system not the barrel length. The difference between the two is where the FSB is located. The carbine gas system's FSB is about 7" from the receiver. The mid length gas system's FSB is about 9" from the receiver. Neither has a 14.5" barrel with a permanently attached FH. Fixed FH's become part of the barrel length for legal purposes. So, a 14.5" with a fixed FH that is a little longer than 2" becomes a 16" legal barrel. A 16" barrel with a screwed on FH is still a 16" barrel for legal purposes, but appears to be 18". Either one of the two is a good choice. The mid length may shoot a little softer and be less harsh on components. A carbine has been used for a long time and works fine, too. A mid length will give you slightly less choices in some hand guards, but it also gives you more rail space, a longer sight radius, etc. If prices are close (I didn't look) I would get the middy. ETA: The midlength you posted is the more expensive hammer forged barrel. This one is the identical midlength to the carbine you posted for the same price. |
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yeah sorry i may have not been very clear as to what i was talking about (quicky typed it up while at work), i basically wanted to know the difference between the 2, i thought it may be gas system length but i also mention the 14.5 barrel with the fixed FH, as i was unsure about carbine mid/carbin. either way thanks that helps alot, i think they are actually the same price, but i may not be buying the entire set up, but when purchaseing barrels if i buy the compenents seperately this information is very helpfull. thanks
Ryan |
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I think midlength is the best choice so that's what I just went with on my new build. Very glad I did.
But it may weigh a little more (up to 1/2 lb.) than an M4 profile carbine length which usually has the M203 cut out and a barrel diameter less than the 0.750" of many middies. Edit: the threaded A2 flash hider added 1.5" to my 16" barrel but it's a good tradeoff to not have it permanently pinned to a 14.5" barrel. |
| while i am at i have most of the searching done for my parts but i have not made a decision on my buttstock, any suggestions? was thinking 6 position, but which brands are going to give me the best bang for my buck, i thought magpul ACS possibly; i do want to keep everything Mil-Spec for this build. also does anyone have a good line on buffer tube assemblies kits? |
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Quoted:
while i am at i have most of the searching done for my parts but i have not made a decision on my buttstock, any suggestions? was thinking 6 position, but which brands are going to give me the best bang for my buck, i thought magpul ACS possibly; i do want to keep everything Mil-Spec for this build. also does anyone have a good line on buffer tube assemblies kits? Some how I ended up with one of each in each color. Clockwise: Mil Spec OD MOE - $50 (sitting on a build), Commercial Foliage Green CTR - $100, Mil Spec Black ACS- $120, Mil Spec FDE UBR - $250. The MOE and UBR are pretty simple to choose from based the amount you want to spend and function of the weapon. The CTR and ACS are a little more difficult. They are close in price, the ACS is heavier, has storage and a better cheek weld. Both have the clamp and the ability to use sling swivels or loop attachments. 
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Quoted:
alright i am currently putting my ducks in a line for my first new AR build but had a somewhat easy question for veterans out there, i am looking at an M4 Style carbine but i see there is and M4 16" carbine length and an M4 16 Mid Length If you want the M4 carbine look, stay away from 16" barrel mid-lengths. They are a civilian product that the military never used. If you want as close to the real M4 as possible, buy a 14.5" upper with MILSPEC barrel and M4 cuts. Have the extended A2 flash suppressor from Sabre Defence permanently installed by ADCO and you will have a good M4gery. To be as close as possible, buy a Colt 6921. |
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