My local dealer has a M&P 9 with the threaded barrel. It is on sale and I have been wanting a 9mm anyway.

I have no use for the threaded barrel, but I am curious as to the length. Maybe the extra barrel length would help slighly with velocity? Im guessing it is a 5 inch barrel? Cant find much information on it.

Also, does anyone make a screw on compensator for it?

What help in velocity do you need? The threaded barrel may be 1/2" or so longer. Once you know the thread size (1/2x28 most likely) you can find many flash hider candidates.

I would gladly trade you a very lightly used (100 rounds) Storm Lake 9mm full size M&P barrel for the threaded factory full size barrel. Midway sells these for $140.00 plus S/H.

See their barrel's here:
StormLake | Smith & Wesson Feature Tour

Have fun and be safe.
Nightshade2x

My M&P Special Ops is threaded 13.5x1 LH, not 1/2x28.

However I have heard that S&W also released a run that was threaded 1/2x28.

So if you already have a can you better make sure which thread pitch you are getting.

I just happen to have my SpecOps box in front of me. The sticker says the barrel is 4.75". As mentioned by Colt_SAA it is also 13.5x1LH. If you don't mind me asking -- what are they going for now a days?

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You might want to look into this a bit. Some folks have more luck than others with these barrels dropping right in and shooting like a charm. "Drop and Plop" I call it.

Then again, some people end up having to take the gun and conversion barrel to a gunsmith and have him 'mill it' and make sure the tolerances are 'just right'--or as good as they can get anyway.

I hear when the setup is right (and again, for some--it's a breeze--no smithing required) they shoot great--very accurate and are easy in and out.


For some reason, the conversion barrels seem to 'drop and plop' into the Glocks much easier, which for some reason, irks me a bit. I shoot both M&P and Glock, but increasingly, I'm bigger on M&P's stock, especially in light of how I feel the 4th gen Glocks came out. I know some think they're fine, and Glock will send you a different spring if you don't like how a 4th gen. handles, but personallly, I see S&W M&P's 'star' shining a bit brighter these days.


I was sort of keen on getting a 9mm barrel for my 40c, (and even perhaps a 357) but I'm not too sure anymore.

I want a small, slim 9mm--it's a 'niche' I want to fill in my 'collection'--with a gun perhaps a wee bit smaller than the 40c.--Sort of along the lines of the BG380, but moving up to a 9mm, a little bigger, a little heavier would manage recoil better and hopefully be an accurate and reliable 'pocket rocket' still. I have my eye on a couple different model guns now.

A 357 in a small gun? Well I could handle the snap, recoil and noise, but I don't think I want to.

When I realized I might or might not have a 'drop and plop' Storm Lake set up, (luck of the draw) I started pricing a couple guns, adding up the S.L. conv. barrel price, possible gun smithing prices the price of the new magazines the barrel would require and realizing that ultimately, if I'm short on time, too dang lazy or plumb forgot to put the 40c barrel back in, I wouldn't have a self defense weapon I feel a 100% secure about, or if I was a total slacker, the wrong magazine and barrel combo, leaving me withan inoperative gun, 'all that' (gives) me 'pause for thought'.

if it's not a ton more money, I'd rather have a new sub compact 9mm, one I could just grab and run with 'as is'.

You may get into one of these conversion barrels for not much more than a $100--$120+, then about $30 for a matching magazine and essentially have two guns for around '$150ish' in a best case scenario, but as for myself, I dunno....

Everything I have heard is the opposite, which is, they drop right in. Especially with factory barrels (I have a factory 357 Sig barrel I use in my .40 on occasion) It's true I've only heard about a handful of the Storm Lakes being used but never a problem. I know Storm Lake uses the disclaimer that they may need to be fitted, but again, never heard of any first hand accounts that they needed fitting. I would hazard a guess that the VAST majority drop right in .

To the OP, If it's cheaper then a non threaded version (hard to believe) get it and sell/trade off the barrel. Other wise i have to go with ken158 on this one...What help in velocity would you need?

S&W barrels drop right in. I don't know about other brands...

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S&W barrels drop right in. I don't know about other brands...

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They have this one on sale for $529.99