Hello I have done a ton of research on the Smith and Wesson M&P Sport and have decided to purchase it however I am in NYS and all they have is the model without the flash suppressor. Anyhow I am Law Enforcement and need this gun by in two weeks and the 811037 model is backordered everywhere and it would take awhile to get in. I have no choice but to purchase this model and the 30 round magazines however I wish I could put a flash suppressor on it or have the option to put a muzzle brake.

Anyhow Is it possible that the Melonite Coating is to hard for machinest to thread the end of the barrel to put a suppressor on it. Does anyone know if this can be done and would the cons outweigh the pros of having done this modification. Thank you for any help.

If you read up in the barrel specs for sport you will find some engineering specs on Melonite treatment process, it is not really a coating, it is a treatment but I believe it can be machined. When I took my front sight base off to put the microgas block you could see where they drilled the holes for the base and if they could drill it a machinist could turn it. You could also get a pin on suppressor/brake. Due to your state laws they may have to weld the pin in after installing it and then grinding it down but it can be done....good luck!!

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Grover Oathkeeper

I would rather have it drilled as the first option however I would not even know where to get it drilled at. I would ask the gunsmith that I am buying it from and I am sure he could help me. Is there anything I should look out for is it a simple process or could drilling it ruin the barrell? Also I kind of like the pin ons but also found something like this which I beleive could work if I can find it for my gun

Scherer Muzzle Brake Adapter AK-47 Steel Blue

Wondering about the economics of it myself. Might be cheaper to sell/trade the weapon later on when they get the one in you want than it will be to get this one threaded. I had looked into getting an old Clinton-ban barrel threaded myself but came out cheaper gettin a new barrel. YMMV.

I have that kind of adapter on the end of my M&P 15-22 rimfire as it didn't come with a threaded barrel. It works but you really need to tighten and loctite the set screws fully or else you'll find yourself looking for you muzzle brake down range. haha

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- Bill

Ahh thank you for the tip I also read that you can drill a small hole in the area the screws would go in the barrel and set them in there. Obviously not all the way through the barrel but just enough to set the screws. Depending on the price of getting the barrel threaded this might be the best option. Is there any risk of ruining the barrel or accuracy when you thread a barrel?

Yeah. I though about drilling in some dimples for the set screws to dig into, but got them torqued down tight enough with enough loctite after picking the flash hider off the range floor the first time shooting with it. haha

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- Bill

The accuracy can be effected if the crown is damaged and the barrel not re-crowned. Most reputable smiths will re-crown after threading. Taking the barrel to Joe's machine shop to get it threaded probably isn't a good idea. As far as smith's go, there aren't alot of 'em doing this kind of work these days, that's why it costs so dad-gum much.

Very good guys thank you for all the help suck being LEO in a state that has all these rules. Going to most gun shops they have a small section of pre-ban stuff and goodies however if I really want something I have to go to P.A or look online and even then they get iffy about selling it to someone from NY

I feel you pain. We were so close to losing all our ARs by some proposed legislation this month. It was withdrawn at the last minute but is sure to be resubmitted next year.

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- Bill

Adco Firearms has a good reputation and only charges $65 to thread/recrown a barrel and about $30 to pin a muzzle device.

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Improvise, Adapt, Overcome

If you are going to thread the barrel, screw on a muzzle break on instead of a flash hider unless you feel your needs as a LEO make the flash hider imperative.

Be aware that there is always the possibility that threading the barrel may degrade accuracy. The inner diameter of the barrel can be affected by the threading process. Unless you shot Camp Perry, it's probably not enough to matter, but it can happen.

you can also find brakes/flash hiders that clamp on like the adaptor. you might look for one of those, less items to purchase. Just a thought!

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Grover Oathkeeper

Any good machinist should be able to thread the barrel and carbide should have no problem cutting the threads. If I still had my lathe I would do it for you...Machinists are like doctors...some are good and some I would not take my dog to. If it were me, I would look for a small shop that possibly had a CNC lathe...they could program a dummy part and get it dialed on that and then do your barrel. It would take the machine less than 30 seconds to thread it and do a perfect job...the time is in programing and set up but thats pretty fast with a skilled operator. The dummy plug would get the pitch diameter dialed in and you could try your supressor on it for a good fit. There are many small shops with capable people in them that could do a good job, it does not have to be a gun smith...many machinists have a lot more experience threading parts than a smith has. Check your yellow pages and look for a small shop...bigger shops do not want to bother with a nickle dime job and even $180 is nickle dime for them. Not sure but I think a 1/2-28 is what most supressors use...depending on caliber.....Another thought...just send it into S&W and have them do it for you...they probably charge less and may just do a barrel exchamge.....fed ex it next day air and it would be back quickly. Just my thoughjts.