That's not quite what was said in the first post. She said she owned a .22 and experienced stronger recoil from a Mini 14 and an M14 relative to her rimfire not that she found it overwhelming or objectionable. She wanted a comparison with what she experienced. If she can shoot an M14 then she has no need for gimmick stocks but should stay away from heavier shotgun loads at least in the beginning until she develops proper stance and shooting form.
What you posted initially was the highspeedlowdragmallninjatacticool version with a full pistol grip stock. The pistol grip stock is better suited for a shotgun when it is used like a rifle such as for deer or turkey hunting or three-gun competition. They are ill-suited for wingshooting due to the position of the back hand which inhibits a smooth swing and proper gun mount. The tactical version is also entirely useless on a Mossberg due to the safety position.
The more traditional Comp Stock would be better in this regard however they add more weight to the back end of a gun and can make the gun whippy. Knoxx didn't invent recoil reducing stocks. They have been around for decades in one form or another. They have a limited popularity in clay shooting, mostly among trapshooters, and are very rare in the hunting fields. I would only suggest a gimmick stock to a new shooter after all other avenues were exhausted and recoil remained a serious issue.
i missed the second post where she said she wanted this for wing shooting. for general purpose shotgunning pistol grip stocks are fine - many people use them. i even clarified if she wants this for clays it would be unsuitable, and recommended she try the 870 Express 20ga with the standard stock and if she needs further recoil reduction to add a SpecOps or Compstock.
a .223 Mini-14 is
anything but strong recoil.
she didnt say she found shooting an M1A
pleasant, just that she had fired one. a woman being capable of shooting an M1A, and shooting one comfortably without developing poor shooting habits are two different things entirely. for new shooters - especially those worried about recoil - it is best to eliminate it as a factor entirely.
there is nothing 'mall ninja' or 'gimmicky' about adding a Knoxx stock to a gun. a stock that soaks up 90% of the recoil of a gun is a highly practical upgrade for the recoil sensitive.
this is mall ninja - completely nonfunctional stock just to look cool, breaching device, two sidesaddles
, heat shield, eotech, etc:
initially i
loathed the Knoxx stocks, thought they were ridiculous and made Fudd statements about them (and plastic in general) quite similar to what some of you are making. then i actually bought one and became a total convert. shooting a shotgun with practically zero recoil is quite amazing, and i believe that this is
far more beneficial to new shooters than the disadvantages of a pistol-grip stock for some types of shooting. for a general purpose shotgun i will continue to recommend the Knoxx stocks. once they become completely comfortable with shooting and are no longer intimidated by recoil, they can be worked up to more formal guns.
my g/f and her friends were
very intimidated by shotguns at first. with the exact gun i posted, they actually started enjoying themselves and taking an interest in guns and shooting that they didnt have when just shooting my doubles or full-sized traditional pumps. $150 is a very cheap price of admission for getting a girl to change her mind and actually take an interest in an activity that she was originally intimidated by and disinterested in.
I've been gone for the day but I didn't think my thread would be 5 pages long when I got back! I feel like I've stirred up a bit of a hornet's nest between manbearpig and Win/64... I can't figure out if you guys are joking in sarcasm or actually can't stand each other... 
Errrmmm... forget that I said anything...
