Tell me about the M42000


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ny32182
October 4, 2010, 11:30 AM
I've had a couple of rifle cans vaguely on my wish list for years now; they never seem to creep to the top, so now I'm at the point where I realize I just need to make "the decision" to buy them or it just isn't going to happen on its own! :uhoh: I think part of the reason is that at the end of the day I just don't have any "practical" use for one, but they are just so damn cool and fun.

Anyhow... I was very impressed with the beating that I saw an M42k take at a suppressor shoot one time, so I always figured when the time came I would just get that one; since it is basically an un-re-sellable item that will be owned forever, I want "the best". 11.5" is probably the shortest I would run it on, though I have a 10.5" as well. I've read that on SBR's, every little bit makes a big difference in wear on the can, so keeping it to 11.5" is fine, but I do want it durable and reliable on the 11.5". I also want maximum sound reduction, and the M42k looked like it fit that bill pretty well in the limited research I did a while back.

So, any reason not to go with this one? Are there "better" 5.56 cans out there, and if so, why are they better?

For a while it seems like they were coming out with a new M42K every year (Mod 06, 07, 08....) which made me a little hesitant.

I've heard they have changed around the mounting system; what is the best course of action with that?

Any other info I should know? Thanks for any input.

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Arkady
October 4, 2010, 02:58 PM
The Mk-2k is solid.

It meters very well, the entire baffle stack is made from 718 Inconel, and circumferential welds all around.

As far as short barrels, every little bit makes a difference. If you want to run it on a SBR, look into getting a muzzle brake mount. The two chambers of the brake will take a lot of the abuse that your blast baffle would otherwise have to absorb. New mounts are around $90, but that's a lot cheaper than a new can + stamp.

jmorris
October 4, 2010, 05:46 PM
If you want to go low buck you can use a 762 SD on a 223, it’s just longer and heavier (but you can have 1 can for .223 and 308). The M4 2000 is a little smaller than the M4 1000 and has a different latching device that locks but is a different (finer tooth) mount. They will all thread on the same QD mount but I wouldn’t go blasting away with the 2k unless on the fine tooth flash mount. The 3 prong FH will give a “ding” but it’s an easy fix, just bridge the “tuning forks” together with a TIG bead and all is good.

I use the M4 1000 mostly on a 10.5” upper that is just a bit shorter OAL than a regular 16” setup. The 2K costs about $300 more and to me doesn’t give you much over the 1K (you can have a 1K and SBR stamp for $100 less). You do get a better pouch for your $300 though.

762 SD

M4 2000 and mount

M4 1000


http://i121.photobucket.com/albums/o213/jmorrismetal/can/DSC02178.jpg

http://i121.photobucket.com/albums/o213/jmorrismetal/can/DSC02179.jpg

jmorris
October 4, 2010, 05:58 PM
The 2k is rated 100% full auto on a 10" barrel and none show any side effects from casual 10.5" .223 use. To me a 10.5” rifle with a suppressor is a lot more “practical” than an unsuppressed 16” rifle, just as handy and a lot better on your ears.

ny32182
October 5, 2010, 09:31 AM
Thanks guys; nice comparative pics jmorris. You actually captured three of the ones I was looking at in a single frame.

I am interested in a .30 cal can as well, but was planning to get a dedicated 5.56 can in addition to a .30 cal, if for no other reason than to split the wear between them. Realistically I probably shoot three times as much 5.56 as I do .308, and was planning to get only one 5.56 can for now, hopefully to swap between two or more guns.

To say "money doesn't matter" is of course not accurate and always relative, but max durability will mean more to me than $300 in this case.

"Rated for full auto on a 10" barrel". Yes, that is the statement I like about the 2k. If it can handle that it can handle whatever I will do to it for a while. I saw a 2k absorb 2500 rounds of full auto on a SAW in one afternoon once; I was pretty impressed with that.

I remember when the 1k came out, and it was billed as similar to the 2k, but using slightly lesser materials in order to bring the cost down some. That was my impression... is it a true statement that the 2k will hold up better for a longer time on short barrels? (Not to take anything away from the 1k; I'm sure its a great can)

What about the mounting systems? There seem to be several types and it seems pretty confusing. Number of teeth, brake vs. FS, ratched vs. non ratchet? Arkaday mentioned that a brake type mount will be an easily replaceable component that can absorb some of the abuse on a short barrel. I like that idea, but I bet there is a heavy blast/concussion penalty when shooting unsuppressed?

jmorris
October 5, 2010, 10:04 AM
I remember when the 1k came out, and it was billed as similar to the 2k, but using slightly lesser materials in order to bring the cost down some. That was my impression... is it a true statement that the 2k will hold up better for a longer time on short barrels? (Not to take anything away from the 1k; I'm sure its a great can)

What about the mounting systems? There seem to be several types and it seems pretty confusing. Number of teeth, brake vs. FS, ratched vs. non ratchet? Arkaday mentioned that a brake type mount will be an easily replaceable component that can absorb some of the abuse on a short barrel. I like that idea, but I bet there is a heavy blast/concussion penalty when shooting unsuppressed?



The M4 1000-08 didn't "come out" it is just the last generation of the 2K renamed. It’s made from Inconel, SS and is fully welded just like the 2K, just priced better as it is “old school tech”. As I said above I use my 1K more than the 2K as my ears can’t tell any difference. I guess having one of everything was more important than the price to me, I was just saying you could save $300 and still have what you wanted.

The 2nd photo above shows the different mounting systems. The middle suppressor is the 2K you can see the push button latch that corresponds with the fine tooth flash hider, it more or less ratchets into place.

The bottom is the 1K, exactly like the 762 SD it has a spring that snaps into the groves at the base of the flash hider to lock it in place.

I only have brakes on my 3 gun rifles and I use custom molded plugs when I shoot them and add muffs on top if I RO others shooting brakes. I would never put a brake on a rifle I might have the slightest chance of firing without ear protection, yes that means even in an emergency.

ny32182
October 6, 2010, 10:45 AM
I definitely did not know that about the 1k.

What is the ballpark useful life of any of these, and how do you know if they are getting worn out?

jmorris
October 6, 2010, 04:07 PM
Heat or a baffle strike is what kills them, other than that they will out last you.

Ironman
October 6, 2010, 05:09 PM
Coming from someone who owns a m42k mod08 and has many rounds through it ill say this......its a great can but id wait a couple months and see what rifle cans Silencerco comes out with. Considering their track record to think outside the box and bring some really great products to the market id say waiting a couple months would be the least you could do. Imagine you buying a m42k and then their can comes out and its better. It happens all the time in the suppressor market. Hell when my HEMS2 was in the approval process i had traveled to the silencer shoot and shot the prototype osprey45..... i was pissed. lol

Just sayin

jmorris
October 7, 2010, 09:30 AM
id say waiting a couple months would be the least you could do.

You will do that no matter what you buy or build. If you wait until the "best" one comes out you'll never have one. You can have more than one.

ny32182
October 7, 2010, 09:40 AM
Very true....

I emailed a new shop near me for a couple quotes; awaiting reply.

LiquidTension
October 7, 2010, 10:14 AM
Ask about their transfer prices as well. It is often cheaper to order from Major Malfunction and pay a transfer fee than it is to pay retail (or even under retail) at a shop. Allen Arms and Gordon Specialties are up in your area of the state. I've done business with Gordon Specialties. They're a small shop but good to deal with. Allen Arms has a good rep but I've never been to the shop before.

ny32182
October 7, 2010, 10:24 AM
Good call, I will check on the transfer prices.

Gordon Specialties; I will need to look that one up.

Allen Arms; they have a real nice shop with good selection, a nice indoor range; I even know the owner from long before he opened the shop and he is a real good guy as far as I'm concerned; there is just no getting around the fact that their prices are high though. The shop I referenced above was actually opened by a guy that used to work at Allen Arms. Unfortunately with his hours I have not been able to make it there yet (not open on the weekends) but I've seen him advertize some good prices on rifles, so I figured it would be a good place to check.

There is another place, Upstate Armory Group that I will check as well. I have a buddy that did two cans through them; not sure if it was a transfer or if he was buying directly from them. I have never been to that shop either though.

LiquidTension
October 7, 2010, 02:17 PM
Upstate is a great outfit. I've been doing business with them ever since I bought my EOTech several years ago - for $355 :what: I make it a point to hit their table at every gun show and buy something, even if it's just small stuff like grips or rail covers.

ny32182
October 15, 2010, 05:48 PM
There is one at my local shop for $895 I believe; how does that sound?

There was also an M41k for 675 if I recall.

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