Weight question

[Will545]

I'm curious what the weight difference is between two rifles that are exactly the same with the only difference being one is a 14.5" carbine while the other is a 16" mid length. Anyone know how much weight difference there would be between the two rifles AND how drastically would that weight effect the balance of the rifles?

[Leaveammoforme]

Actual m4- 6.36 lbs

http://en.m.wikipedia.org/wiki/M4_carbine


6920 - 6.9 lbs + what? Maybe .2 for longer handguard & gas tube of a mid length?

http://www.coltsmfg.com/Catalog/Colt...920Series.aspx

Use google, you can get a better answer if its really that important.

[3 AE]

You can use this AR-15 weight calculator to help get you the answer.

http://vuurwapenblog.com/calc.html

[discreet]

I'm curious what the weight difference is between two rifles that are exactly the same with the only difference being one is a 14.5" carbine while the other is a 16" mid length. Anyone know how much weight difference there would be between the two rifles AND how drastically would that weight effect the balance of the rifles?

Depends on barrel profile. With a heavier profile barrel there will be more weight in the amount lost. In a pencil barrel you probably won't really notice anything. Heavy barrel maybe. Remember unless you SBR it, you have to pin/weld the device which ultimately needs to be longer to make the 16in mark.

To put it this way, a 16in LW BCM barrel is only a little heavier than a 10.3 dd barrel. Why, because of a lighter gas block due the .625 block area and thinner barrel from there to the muzzle compared to a 10.3 which is a normal gov profile.

Now will a 16in pencil barrel be lighter than a 14.5 gov barrel, def yes. Just like a 14.5 pencil barrel will be a whole lot lighter than a 16in gov barrel and so on.

IMO barrel profile is what will save weight in the end, compared to losing only a tiny bit of weight with a shorter barrel.

[jerrysimons]

1oz or less depending on the muzzle device used between them
https://spreadsheets.google.com/spre...hUVpYMVE&hl=en

[_Stormin_]

how drastically would that weight effect the balance of the rifles?

Very curious as to why you're concerned? Are you building a rifle for a specific purpose? If so, what is that purpose?

Answers to the questions above are going to lead to a much clearer answer than simply a numerical weight difference, and how far back or forward a balance point would shift (which would be no more than an inch or two at most).