Quote Originally Posted by Firn View Post
BushrangerCZ answered the question already pretty well. Basically there are four ways to get a very good gunfit:

a) An individual stock as for high-end rifles and guns. Clearly not possible for an army and it would not address the clothing/body armor changes.

b) A simple stock with various spacers. Just take the recoil pad off, insert or take off the right amount of spacers, screw everything in place and you are good to go. Light and very robust. (Thicker recoil pads are also an option)

Some cheek pieces are also made of spacers fixed in a variety of ways.

c) An adjustable lenght of pull mechanism, just like the ones seen on the M4 and a couple of newer assault rifles. Pretty much standard on high-end match rifles. The most flexible and neat solution if it is soldier-proof.

d) A combination of b and c. So you might have a adjustable cheekpiece and spacers for the lenght of pull. Cheekpieces are not that important for red dot sights, but can help when using (big) scopes.
Lets just make sure we are on the same page with regard to "length of pull" (see photo below):



That said and done it still leaves the ability to adjust "comb height" (cheek position) and how many weapons have that ability? The normal cheek position is based on the use of the iron sights.

In the photo of the shooters above, there is no way that the closest man has the correct length of pull.