15 inch barrel, with rifle gas! almost rifle velocity, and i runs great


Firearm & Gun Forum - FireArmsTalk.com > Long Guns > Auto & Semi-Auto Discussion > AR-15 Discussion > 15 inch barrel, with rifle gas! almost rifle velocity, and i runs great

Reply
 
LinkBack Thread Tools Display Modes
Old 07-31-2012, 08:30 AM   #1
Feedback Score: 0 reviews
 
Middleofthemiddle's Avatar
 
Join Date: Feb 2012
Posts: 11
Default 15 inch barrel, with rifle gas! almost rifle velocity, and i runs great

This rifle is awesome

forumrunner_20120731_003003.jpg



__________________
Middleofthemiddle is offline  
 
Reply With Quote

Join FirearmsTalk.com Today - It's Free!

Are you a firearms enthusiast? Then we hope you will join the community. You will gain access to post, create threads, private message, upload images, join groups and more.

Firearms Talk is owned and operated by fellow firearms enthusiasts. We strive to offer a non-commercial community to learn and share information.

Join FirearmsTalk.com Today! - Click Here


Old 07-31-2012, 09:42 PM   #2
Feedback Score: 0 reviews
 
Quentin's Avatar
 
Join Date: Apr 2010
Location: Idaho
Posts: 6,657
Liked 1069 Times on 752 Posts
Likes Given: 1073

Default

Does that thing cycle with Wolf? Heck, does it cycle with anything?



__________________

______
The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together. You'll remember the quality of a gun long after you forget how much you paid for it.
________________________________________
US Army 1966-69, VFW Life Member, Retired Geek

Quentin is offline  
 
Reply With Quote
Old 07-31-2012, 10:12 PM   #3
Feedback Score: 0 reviews
 
Middleofthemiddle's Avatar
 
Join Date: Feb 2012
Posts: 11
Default

I won't shoot wolf but I shoots pmc .223 and and all the 5.56 I have put through it. It just took some fine tuning, but it runs smooth and very clean. Its getting 3025 fps with federal 5.56. I had this idea and I was sure I can make it work

__________________
Middleofthemiddle is offline  
 
Reply With Quote
Old 07-31-2012, 10:18 PM   #4
Feedback Score: 0 reviews
 
Quentin's Avatar
 
Join Date: Apr 2010
Location: Idaho
Posts: 6,657
Liked 1069 Times on 752 Posts
Likes Given: 1073

Default

Well it looks great!

__________________

______
The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together. You'll remember the quality of a gun long after you forget how much you paid for it.
________________________________________
US Army 1966-69, VFW Life Member, Retired Geek

Quentin is offline  
 
Reply With Quote
Old 07-31-2012, 10:46 PM   #5
Feedback Score: 0 reviews
 
Middleofthemiddle's Avatar
 
Join Date: Feb 2012
Posts: 11
Default

Thanks! It has a 20" rra hbar that i cut to 15" and permed the flash hider. I also cut a 11 degree crown.this thing is also sub moa

__________________
Middleofthemiddle is offline  
 
Reply With Quote
Old 07-31-2012, 10:55 PM   #6
Feedback Score: 0 reviews
 
SSGN_Doc's Avatar
 
Join Date: May 2012
Posts: 4,609
Liked 2396 Times on 1402 Posts
Likes Given: 539

Default

What was your idea?

The Dissipator ahs been around for a while. 16" barrel with rifle gas system and some versions with carbine systems and rifle length hand guards. Short barrel with long sight radius and more heat shielding to "Dissipate" the heat was the original marketing on them. Bushmaster and DPMS made versions and had a law suit over who could use the name Dissipator. The gas sytem shouldn't have much to do with the velocity. Right around 3000-3100 FPS is about normal for a 55gr load. A 20" barrel would get it up to about 3250-3300 FPS.

Some folks ahve had cycling issues with rifle length gas systems on carbine barrels in really cold weather, but that is about the only negative I have seen along with some ammo sensitivity for lower powered rounds. This can sometimes be corrected with a lighter buffer or opening up the gas port a bit to get more gas into the system to compensate for the reduced dwell time that results form having the port so close to the muzzle.

Enjoy the set up, they are really sweet to shoot. I've been a "Dissy" fan for a long time

__________________
SSGN_Doc is offline  
 
Reply With Quote
Old 07-31-2012, 10:57 PM   #7
Feedback Score: 0 reviews
 
SSGN_Doc's Avatar
 
Join Date: May 2012
Posts: 4,609
Liked 2396 Times on 1402 Posts
Likes Given: 539

Default

Oh, Now I see from your most recent post that you cut the barrel to 15" and perm attached the FH. That would indeed be a bit different than a 16" Dissy.

__________________
SSGN_Doc is offline  
 
Reply With Quote
Old 07-31-2012, 11:10 PM   #8
Feedback Score: 0 reviews
 
Middleofthemiddle's Avatar
 
Join Date: Feb 2012
Posts: 11
Default

The dissy barrels had middy set up, just a rifle sight radius. And with the gas not dumping the pressure untill the end of the barrel not the middle or the beginning. It has more time for the gas to expand without losing pressure. So it retains more velocity. 2900 to 3000 through the crony.

__________________
Middleofthemiddle is offline  
 
Reply With Quote
Old 07-31-2012, 11:21 PM   #9
Feedback Score: 0 reviews
 
powell0892's Avatar
 
Join Date: Jun 2012
Posts: 124
Liked 2 Times on 2 Posts
Likes Given: 1

Default

I think the rail should be a little longer

__________________
powell0892 is offline  
 
Reply With Quote
Old 07-31-2012, 11:34 PM   #10
Feedback Score: 0 reviews
 
Middleofthemiddle's Avatar
 
Join Date: Feb 2012
Posts: 11
Default

Haha, its going to be awesome when I have a can to put on it.



__________________
Middleofthemiddle is offline  
 
Reply With Quote
Reply

Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Firearms Forum Replies Last Post
Velocity in a short barrel grizzlymag General Rifle Discussion 3 11-12-2011 04:55 PM
How long does a rifle barrel last? Yunus General Rifle Discussion 11 09-29-2011 08:22 PM
barrel length and velocity? planenut General Handgun Discussion 4 03-29-2010 04:22 AM
Lava and Cox rifle barrel NO *1* rdelia1984 General Rifle Discussion 0 01-29-2009 05:21 AM