Originally Posted by
JRB
Speaking from personal experience from instructing Soldiers of all shapes and sizes, the LOP is absolutely critical for proper control of the weapon in FA/burst, or with higher recoiling weapons. It is also critical for maximizing the number of possible firing positions that are comfortable, stable, and repeatable for a given shooter. One of the first steps I take when 'retraining' a Soldier that is struggling with zeroing or qualification is to see the 'fit' of their IOTV and how they adjust & hold their assigned rifle. I have seen a lot of Soldiers show *immediate* improvements just by getting them to properly adjust their buttstock to match their size and their gear. Tons of Soldiers run it all the way out because of some SNCO telling them to, while others run it damn near fully collapsed because it's easier to carry that way.
Bullpups significantly limit that adjustment window because the LOP is very long. If it's adjustable, the adjustability range is from 'very long' to 'way too long'.
Not an issue for folks that are 6ft3, but definitely an issue for a shitload of folks in the 5ft range like I am.
I'm 5ft 9in, so I'm just barely not a 'manlet'. If I'm wearing body armor, my arms are not long enough to safely fire an M203 mounted to an M16A2 or other A2 stocked weapon. I can barely physically do it, but sight alignment is out of the question and it's blatantly unsafe.
Simply changing the buttstock to the M4 style adjustable buttstock kit and suddenly the exact same combined weapon system is very effective and easy for me to use.
While that is an extreme example, the same applies to the very long LOP with bullpups when combined with smaller statured shooters, body armor, and optics or other sights with a specific eyebox. While the shooter might be able to use the weapon, even use it effectively, the longer LOP limits comfort, recoil control, and available ad-hoc/hasty firing positions or stabilization techniques.
While not relevant to rifles, I've seen this as well in my own recreational experience with some of the cheap shotguns on the market these days. The awkwardly long LOP found on both the bullpup and the traditional pattern imported McShotguns often makes it a right bastard for smaller folks to comfortably fire them, even with a massively bladed stance while standing. Meanwhile, those same shooters have a much easier time both with shooting well and with recoil control with an old Mossberg or 870 using a youth stock, or something like a Mesa Tactical AR pattern buttstock adjusted to a suitable LOP for them.
tl;dr I firmly believe that the LOP measurement on bullpups is just as significant and important as it is on traditional pattern rifles, and the long LOP is one of the biggest disadvantages of a bullpup especially for institutional users.