S&W MP 15-22 mods

[el tardo]

just got one home tonight and tore it apart to paint it. my question is after taking it apart it looks alot like a ruger 10/22 system.yes i know there both blow back bolts and have springs. so with a ruger 10/22 you can get softer springs to allow you to shoot sub sonic ammo with any issues.
i took the bolt apart on the S&W and you can remove its spring as well. so i was thinking you can run a softer spring so it can run sub sonic ammo.

this gun is for my son cause i kinda took over his 10/22 and turned it into a killer.

so has anyone ran sub sonic ammo and or played with a softer spring?
the manual says the gun wont cycle with sub sonic ammo. ruger said the same thing but a man named kidd makes special toys for them and they can shoot any ammo.

thanks
mike

[roushstage2]

There are many people around the internet that have said their 15-22s will cycle certain brands of subsonic ammo. Maybe just try a few different brands and see what happens. If you got an extra spring, I suppose you could try cutting coils or something.

[Lovesick Warrior]

Try searching here too:

http://smith-wessonforum.com/smith-wesson-m-p-15-22/

[appagohm]

The springs on those are pretty low powered already, have never herd of
someone selling a weaker spring to cycle 22 sub sonics, and if you mixed up your sub sonic with regular high velocity you might damage your gun. I know the remington sub sonics cycle sometimes, and the cci cb long subsonics
will never cycle. I had an extra spring for my 22a so i ended up cutting a ring at time until the round could cycles with no luck, i cut to where it might cycle but the gun will not go into battery.

Good luck.

[loosewreck]

Sounds like a worth while experiment. I look forward to your findings if you try it out.

Good luck OP.