M14 vs M16 Silhouette

[jpeter56]

Hey guys, I've finally decided to join this awesome forum.

My first post is addressing a question I've had about the m14 and m16 stock height. The AR-series type rifle have a raised stock in line with the barrel to absorb more recoil, and because of this the sights have to be raised.

Therefore my question is, how much higher does the shooter's head rest because of this stock feature? I noticed the older m14 and hunting rifle designs have a downward sloping stock, allowing for the shooter's head to be lower to the rifle and the sights to be mounted lower to the barrel.

I am not trying to bash the AR-series of rifle, I am simply just an engineering student in college trying to digest some of the tradeoffs of the design. I don't want our men to have a higher chance of getting shot, even if it is a minor 5% increased risk. My best to you all and I look forward to many future discussions here on THR. Take care. - JP

 

[Al Thompson]

Actually, it's a non-issue. A shooter should keep their head erect and move the weapon to their eye.

You may get (haven't tested it) a bit more coverage (of your face) with iron sights as opposed to a bit higher cheek weld when using optics. The trade off is that you get much more accurate and quick shots off with the optical sights when the range exceeds a given amount.

 

[mljdeckard]

You are correct in observing that the AR has a different setup than other rifles from before its time. The intent of this difference is that the energy of the bullet and recoil is directed in a straight line to the rear, resulting in much greater controllability. If you look at the AR/M-16, the tip of the muzzle is in a straight line all the way to the back of the stock. Other designs had the barrel elevated to put the sights in line with the firer's eye. This meant that the recoil energy was elevated ABOVE the point of support on the shoulder. The lowered barrel in combination with the smaller cartridge makes the AR one of the most stable rifles in the world when firing.

However, when you really start shooting, you will find that most people shoot the AR better with the stock a little bit high on the shoulder. They put the bottom edge and point of the stock against the shoulder, leaving a couple of inches visible. It doesn't matter a lot, since the recoil is small anyway, but most shooters (who have been trained) will raise the rifle a little to match their cheek.

Now when you move up to a removable carrying handle (flat-top) upper receiver, there is a myriad of aftermarket optics, risers, long and short eye relief combinations, long and short range scopes, rails and accessories that make it possible to set the rifle up however you want to.