AACM4 2000 quick question

[DrBaker]

Will this can work with a 10.3/10.5in barrel and FSB w/bayo lug? I couldn't find any pictures of it on that short of a barrel. Not much room between the threads and the FSB, not sure if it would rub or not.

[CAR-AR-M16]

The M4-2000 flash hider extends back beyond the shoulder on the barrel so it would probably not work on a 10.3" barrel. It might work on a 10.5" if there is no bayonet lug present.

[RobC]

That's the same build that I am looking at. I have been told that it will clear.

Here is a picture of one over at Silencertests.

http://www.silencertests.com/gallery/LMT/IMG_0802?full=1

[CAR-AR-M16]

I stand corrected.:( I sure didn't think a 10.3 had enough room, but can't argue with a picture that shows it clears.

[DrBaker]

Is the pic a 10.3 or 10.5 ?

[RobC]

It's an LMT 10.3.


Rob

[DrBaker]

I didn't think LMT made a 10.3 ??

[RobC]

Oops, you are right. I just checked their website. I must have been thinking CMMG with their 10.3. In any case, there are a number of people on silencer tests running an M4-2k on 10.3 with the requisite bayonet lug.

Rob

[DrBaker]

Guess who just ordered a 10.5 LMT upper?

WooHoo

[Glock 'em down]

Can you "silence" a rifle round? What about the whole "speed of sound" thing?

Excuse my ignorance...

[RobC]

You can greatly muffle the muzzle blast but as you pointed out, you will still have a sonic crack. However, a good suppressor on a .223 sounds about as loud as a 10/22 shooting supersonic rounds. To my ear, the .223 is more pleasant sounding. I think that it is because the shock wave follows the bullet. Think about it, a .22lr going 1400 FPS is going to have more time to make noise than a .223 going 3100FPS. The 223 gets further away faster and gets to the target faster. Shockwave propagation also changes with bullet shape.

Basically, to my ears, a suppressed .223 has a slightly higher pitched crack than an unsuppressed .22lr, but it also seems more staccato. I would rather shoot a suppressed 223 without hearing protection than a .22lr from a 16 inch barrel.

[CAR-AR-M16]

I use my M4-2000 on both my 5.56mm M4 Carbine and my .22-250 Remington 700 VS. Both are quite comfortable to shoot without hearing protection for the reasons RobC pointed out above. My .22-250 is actually more accurate with the suppressor than without.

[DrBaker]

I use my M4-2000 on both my 5.56mm M4 Carbine and my .22-250 Remington 700 VS. Both are quite comfortable to shoot without hearing protection for the reasons RobC pointed out above. My .22-250 is actually more accurate with the suppressor than without.


Any reason you went with the .22-250 instead of the .223 ??

[CAR-AR-M16]

Any reason you went with the .22-250 instead of the .223 ??

Basically because I can shoot the same bullet 600fps faster with the .22-250. Also, I shoot mostly 5.56mm NATO mil-spec ammo out of my M4. A .223 Remington 700 has a .223 Rem chamber, not a 5.56mm NATO chamber (throat is slightly different). SAAMI considers shooting 5.56mm NATO (which is also slightly higher pressure than .223) out of a .223 chambered weapon to be unsafe. I know several people will say that they do it all of the time, but the one unlucky joker who would have a problem would be me.

http://img.photobucket.com/albums/v389/CAR-AR-M16/700wM42000.jpg

[DrBaker]

Sounds like a good reason to me.

[Silent_Weapon]

Along the lines of a "AAC M4-2000 quick question..."

Has anyone tried using the m4-2000 on a ruger 10/22? AAC's website says that it can be used on a .22....just currious...I know it is a bit heavy for a .22can, but with economy of purchases in mind (along with my severely limited funds for toys)...using a .223 can on my .22 might allow additional resources to get a 9mm can...just wondering.

And if you have used it on a .22...how does it compare with the performance of a dedicated .22 can like the pilot/outback II?

[RobC]

I've never shot a .22 through a .223 can but I assume that it would work great for sound reduction. I have shot .22lr through my 9mm can and it is quieter than my Warlock. However, it is recommended that you not shoot many rimfires through any can not designed for them. The problem is that .22s are disgusting. Rimfires generally have cast lead bullets that leave shavings in the bore and suppressor, mix that with unburnt .22 powder, and you have a concrete-like substance that covers and reshapes everything in front of the muzzle. Rimfires never get hot enough to melt the lead but a .223 suppressor will get that hot very quickly. When the lead melts, it can obstruct the bore and then you can end up with a costly and dangerous baffle strike.

I would buy a dedicated .22 can before a 9mm can. I will even say that between my 9mm can and .22 can, I like the .22 more, and shoot it more. It was the most worth while gun related purchase that I have ever made. If I could only have one firearm, I would choose to keep my single shot Remington .22 and my SWR Warlock suppressor. I would give everything else up first.



Rob

[Stoverarms]

Ditto on what RobC stated. While it will work they are two different animals. The .223 can is designed for higher pressures and clean bullets while the .22 lr is lower pressure and dirty bullets. The larger volume of a bigger suppressor sometimes = better suppression.