Are all fixed butt stocks the same length, or does someone make a fixed butt stock shorter than the standard issue? I have a tele. on an M4 now, but I would prefer a fixed stock. However, it's a tad long to get my proper cheek weld when shooting in heavy body armor. The tele. works fine when moved to the second to last position, but the storage in the fixed stock is a nice (and well used) accessory, and I never have to worry about the stock being in the right position when I grab it and go. Any options?