Jump to content


AR15Armory Announcements


Photo

5.45x39 barrels?


  • Please log in to reply
9 replies to this topic

#1 OFFLINE   Troy_Mclure

Troy_Mclure

  • Group:Members
  • Member ID: 16,202
  • Posts: 135
  • Joined: Aug. 08 2009
  • Location:gulf of mexico, louisana

Posted Dec. 10 2010 - 02:31 AM

im looking for a long(20"-24") bull barrel in 5.45x39 for an ar build.

anybody seen one, or know where i can get one?


#2 OFFLINE   shiz

shiz

  • Group:Members
  • Member ID: 18,421
  • Posts: 1,753
  • Joined: Jan. 26 2010
  • Location:Utah


Posted Dec. 10 2010 - 12:50 PM

How come dude?

Russian rounds are not accurate, and it looks like you are trying to set up a varminter, that only shoots Russian rounds. 5.45 is only good to about 150-200 yds anyway. Barrel length does not affect accuracy as much as velocity. Velocity is a moot point with the 5.45, its characteristics are relatively independent of velocity, so really, the optimal length for 5.45 is 14.5 or 16.


Signature:

To me, boxing is like a ballet, except there’s no music, no choreography and the dancers hit each other.

-Jack Handey


#3 OFFLINE   Troy_Mclure

Troy_Mclure

  • Group:Members
  • Member ID: 16,202
  • Posts: 135
  • Joined: Aug. 08 2009
  • Location:gulf of mexico, louisana

Posted Dec. 10 2010 - 03:13 PM

well its gonna be a target/range rifle, 300yd max.

and i want to shoot on the cheap.

i was wanting a longer barrel for further recoil reduction, and reduced muzzle blast.


#4 ONLINE   jtrain

jtrain

    A society that gets rid of all its troublemakers goes downhill.


  • Group:Silver Patron
  • Member ID: 19,220
  • Posts: 5,594
  • Joined: Mar. 26 2010
  • Location:Kernersville, NC


Posted Dec. 10 2010 - 08:17 PM

A longer barrel will not lessen recoil or muzzle flash.
The 5.45mmx39 does not produce a lot of recoil impulse, less than that of a 5.56mm in fact. If you want to tame the muzzle flash, get a good flash suppressor like the BattleComp 1.5 or Rainier Arms XD Flash Hider.

As previously stated the 5.45mm is not very accurate at ranges beyond 100m due to the design of the projectile, the cheap stuff being .53gr
This is a noble thought, but you will get better accuracy from a 5.56mm shooting wolf or brown bear.

I have an AR chambered in 5.45mm, it is piston driven and has a 16" 1:9 twist. It is pretty good accuracy wise, but I cannot manage better than 2" groups at 100m with a Trijicon 4X TA01-NSN (ballistics matched to .62gr Steel Core M855 NATO)

If you are interested in a target/range rifle for 300m shooting, 5.45mm is not where you should be looking. The 5.45mm was never designed for long range shooting, as the 7.62mmX39 was not either.


Signature:

Jtrain +145 feedback. That is the #1 feedback on the forum. No negatives.
JTRAIN-2.jpg

A society that gets rid of all its troublemakers goes downhill. Robert Heinlein

Gold Member 2011, 2012 Silver 2013, 2014

 


#5 OFFLINE   ILove2shoot

ILove2shoot

  • Group:Members
  • Member ID: 21,715
  • Posts: 71
  • Joined: Dec. 09 2010
  • Location:West side of Phoenix, AZ


Posted Dec. 11 2010 - 05:57 PM

well its gonna be a target/range rifle, 300yd max.

and i want to shoot on the cheap.

i was wanting a longer barrel for further recoil reduction, and reduced muzzle blast.


You can get as much recoil reduction from add weight to a stock as adding the longer barrel. it is the weight that is added from a longer barrel that makes the recoil difference. get a flash hider and not a muzzle brake. a muzzle brake forces the blast out sideways or angled back. a flash hider is more focused on dispersing the flash.

I do find my 5.45 uppers have less recoil as compared to 5.56.....I do plink out to 300 yards with it....and without a problem either.


Signature:

www.molonlabe.com


#6 OFFLINE   Troy_Mclure

Troy_Mclure

  • Group:Members
  • Member ID: 16,202
  • Posts: 135
  • Joined: Aug. 08 2009
  • Location:gulf of mexico, louisana

Posted Dec. 11 2010 - 10:09 PM

i realize the weight of the barrel is the only thing that reduces recoil, but it almost completely eliminates muzzle flip. and a longer barrel will eliminate some muzzle flash(and sound) because it gives more time for the powder to completely burn inside the barrel.

a guy at my local range had an ar with a 24" 5.45x39 barreled ar. he regularly hit a 9" steel plate at 300yd with it. sadly he moved before i decided i wanted one.


#7 OFFLINE   MadDoza

MadDoza

  • Group:Members*
  • Member ID: 20,869
  • Posts: 15
  • Joined: Sep. 06 2010
  • Location:Yuma, AZ

Posted Dec. 30 2010 - 11:12 PM

I have a S&W MP15R in 5.45 and I have no problem hitting a 15 inch steel plate a 400 yards using an ACOG 1.5x24. 5.45 is accurate well beyond 100 and 200 yards. I don't know why so many 5.56 shooters dislike 5.45. It's a good round and cheap! The only bad things I can say about 5.45 is that the mil surplus is corrosive, not a prob, just clean your rifle really well using something that will neutralize the salts and the magazines are unreliable until broken in. And even then you gotta keep em clean. Till someone else makes em c-products will have to do.

I have seen some kits out there that include a 16 inch barrel, bolt and a mag out there. But nothing in a 24 inch barrel.

Edited by MadDoza, Dec. 30 2010 - 11:36 PM.



#8 OFFLINE   MadDoza

MadDoza

  • Group:Members*
  • Member ID: 20,869
  • Posts: 15
  • Joined: Sep. 06 2010
  • Location:Yuma, AZ

Posted Dec. 30 2010 - 11:55 PM

Adams Arms makes a good 5.45 conversion kit, but its 16".


#9 OFFLINE   donald150

donald150

  • Group:Members*
  • Member ID: 21,897
  • Posts: 26
  • Joined: Jan. 01 2011
  • Location:Auburn Hills, Michigan

Posted Jan. 01 2011 - 05:57 PM

Hello All

I just found this forum while searching for 5.45x39 info.


I just placed a order for a custom 5.45x39 barrel through Ballistic Advantage, LLC. http://ballisticadva...lc.com/home.php

You may send them a email and see if they will make what you want. I know it is getting late but If you order today you can get a 10% holiday discount.

I am having them make me a 7.5" barrel chambered in 5.45x39 threaded 1/2-28, black finish, and M4 feed ramps on the extension, coated inside and out with Ballistic Nitride Coating.
With holiday discount
$184.50

I just assembled a lower and put a 16" S&W upper on it and I love it. Now I plan to have a matching pistol.

Good luck to you


#10 OFFLINE   MadDoza

MadDoza

  • Group:Members*
  • Member ID: 20,869
  • Posts: 15
  • Joined: Sep. 06 2010
  • Location:Yuma, AZ

Posted Jan. 02 2011 - 12:31 AM

That's a pretty good price, thanks for the link.





Information Center