M&P 9mm Pro

[1911jerry]

What is the poundage of the stock recoil spring in a M&P 9 pro? How do you take the spring off the guide rod?

Thanks

[RWF]

What is the poundage of the stock recoil spring in a M&P 9 pro? How do you take the spring off the guide rod?

Thanks

they claim about #15 seems heavier to me, and no idea.

[ck1]

It's a 16lb spring from the factory.

To get it off you need to clamp the assembly into a vise or hold it solidly with some channel-locks/vise-grips or something and using a nut-driver and some elbow grease you can loosen the hex-nut at the end that'd be towards the front of the gun (pretty sure it's a 1/4" hex IIRC).

ISMI Glock 17 springs are the same spec but be careful going below a 13# (even then, watch it, as M&P's will unlock just by shaking them with a 13# that's seen some rounds, honestly the 16# stocker after 1000+ rds is pretty good IMHO).

FWIW, as far as I can tell, M&P's are not as similar to Glocks as one might think, they're practically single-acton comparatively which is why the striker-spring strength being matched to the recoil spring isn't as critical as in a Glock, however, they lock-up "shallower/gentler" and fall out of battery real easy with lighter recoil springs so be sure and ask yourself if it's really worth it.

Use some loctite on the screw when you put it back together if you plan on keeping it captured.

Edited November 15, 2010 by ck1

[gunnbugg]

It's a 16lb spring from the factory.

FWIW, as far as I can tell, M&P's are not as similar to Glocks as one might think, they're practically single-acton comparatively which is why the striker-spring strength being matched to the recoil spring isn't as critical as in a Glock

True the fire control system works more like a BHP or an XD than a Glock. After you stone that little lip off of the sear, its def SAO.