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VMFn542bob 03-16-2012 07:54 PM

a.k.a MANN Accuracy Rifle

I would like to revive an interest in the MANN Accuracy Device. I do so hoping that future purchasers of this rare and historical machine will appreciate it even more. I have no way of knowing how many unaltered MANN barrels still exist in the CMP inventory. Most purchasers see these as potentially accurate rifles but only if they are modified. I see them at the ultimate accuracy rifle as long as they are not modified. I own two of them and have no intent to destroy them as they were designed and hope other purchasers will follow me. Many threads on the MANN Device were lost when the old CMP Forum software crashed. A few new threads have been posted since then

The mystery of the MANN Accuracy Device explained.
Dr. Mann: Father of Ballistic Science by: Warren Sipe (1960)

Other references -
"The bullet's flight from powder to target" is a 384 page, 14.3 megabyte document by Dr. Franklin Weston Mann.
A PDF version can be read or downloaded from at the following link :
NOTE : This a very large document that is best viewed after being downloaded to your computer hard drive. If you page through it from the Internet you will get bored very quickly waiting for the response.

Hatcher's Notebook - Julian S. Hatcher, Major General, U. S. Army, Retired in PDF (629 pages, 91.8 megabytes) see page 511

pwrshifter 04-07-2012 08:45 PM

Excellent, 2 real good books to read. And yes like you i now have 2 mann accuracy devices, and i just picked up a couple of months ago a barrel from a mann accuracy device. My first one i bought was an abandon project from the group as i had stated in another thread and can be converted back to original, no drilling to the reciever, i turned it into a bench/ sniper rifle and won a f class/ prone match with it (200yd reduced targets).

the other one i have is put away for a rainy day, more of a safe queen, now that i have a back up barrel. But if im lucky i might put close to a 100 or less thru it a year so the barrel should last me a life time. i am hoping this year that i will get a chance to shoot it at a physical 600yds. Now you had just given me 2 books that im going to have to find time to read(other then my usual transmission manuals), i read the article on mr. mann, very interesting biography on him and his life and interests. By the way what ever happened to the postal match that everyone was hyped up for and i dont think it ever happened.

captpete 04-08-2012 10:38 AM

OK - You've got me hooked. I started to skim through Dr Mann's Book - all I can say is WOW! The depth of experimentation is amazing!

Are Mann Devices still sold?

Luke42_02 04-08-2012 10:43 AM

Sold at the bottom of the page:

edlmann 04-08-2012 10:48 AM


Originally Posted by captpete (Post 573558)
Are Mann Devices still sold?

Click here, go to bottom half of page.

kraigwy 04-08-2012 08:18 PM

I wonder how one would go about making this a "sticky"?

VMFn542bob 04-11-2012 11:17 AM

The MANN Accuracy Device for 5.56mm Nato
The MANN Accuracy Device for 5.56mm Nato Ammunition
Aerodynamic & Flight Dynamic Characteristics of the New Family of 5.56mm Nato Ammunition
A report on testing Lake City 5.56mm M855 (Ball) and M856 (Tracer) ammunition using the MANN Accuracy Device Kart-manufactured barrels.

Accuracy and Jump Measurements of the 5.56-mm M855 Cartridge - ARL-TR-5540 May 2011
The U.S. Army Research Laboratory (ARL) performed a jump test and analysis to evaluate the accuracy of the
M855 projectile when fired from the M4 weapon system, and from a Mann barrel for comparison.

kraigwy 04-11-2012 12:07 PM

Thanks for posting that, though I wished you would have waited 3 days. This might cost me more money.

Goldiver 04-14-2012 05:14 PM

Cool info, thanks!


kraigwy 04-15-2012 09:38 AM

The Remington Action on the Mann device doen't have a recoil lug.

How does that affect the device and how would one put it in a stock???

I don't want to do any modifications to the action/device itself.

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