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Author Topic: Side Charging AR-15 upper recievers  (Read 5008 times)

Harm

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Side Charging AR-15 upper recievers
« on: December 05, 2012, 03:51:14 PM »
OK I've got the itch to try an AR-15.  Could be all the people building them  :eh

Anyway my big turn off is I dislike the gas escaping the rear of the received.  I know there are companies out there making side chargers and the like.  American Spirit Arms being a big one.  But looking st their website their upper receivers w side chargers are in 308.  Anyone know anyone making anything like this in the 15 sized receiver rather than an AR-10?
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Langenator

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Re: Side Charging AR-15 upper recievers
« Reply #1 on: December 05, 2012, 03:57:53 PM »
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JesseL

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Coronach

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Re: Side Charging AR-15 upper recievers
« Reply #3 on: December 05, 2012, 04:27:35 PM »
LAR makes one. The problem you will run into on some (most? All?) is how the charging knob is attached to the BC. Due to the way the AR upper is designed, the tendency is to have it be screwed on. The problem is that it could work loose and drop off, and then you could have a problem.

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FMJ

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Re: Side Charging AR-15 upper recievers
« Reply #4 on: December 05, 2012, 04:38:36 PM »
How big of a deal is the "leaky" gas?  I mean, I haven't noticed anything as a left-hander shooting various ARs of different sizes.


I'm trying to comprehend what a side-CH does differently.  I'm a little confused.
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Harm

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Re: Side Charging AR-15 upper recievers
« Reply #5 on: December 05, 2012, 05:48:24 PM »
FMJ - after having a sealed received a la Sig 556 all traditional AR's feel leaky.   >:D. Besides if I build one in 300 BLK I'm running it suppressed and that sucks in an AR. 

Coronach - good point - anyone have any info on that?
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Outbreak

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Re: Side Charging AR-15 upper recievers
« Reply #6 on: December 05, 2012, 07:13:29 PM »
Here's my ASA, in .300BLK, with a suppressor.


I will admit that it does still leak a bit suppressed. With a good cheek weld I feel a very tiny sting on my lips. Just enough to cause a flinch. I'm going to be exploring ways to better seal the back end.
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Penguin

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Re: Side Charging AR-15 upper recievers
« Reply #7 on: December 05, 2012, 07:42:45 PM »
I didn't even know you could get a side charging AR. So does that slot on the side of the reciver let all kinds of crap in? Just asking because that looks posible to me.
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FMJ

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Re: Side Charging AR-15 upper recievers
« Reply #8 on: December 05, 2012, 07:43:44 PM »
What about a piston upper?
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Outbreak

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Re: Side Charging AR-15 upper recievers
« Reply #9 on: December 05, 2012, 08:16:53 PM »
I didn't even know you could get a side charging AR. So does that slot on the side of the reciver let all kinds of crap in? Just asking because that looks posible to me.

It might if I got my rifles near "all kinds of crap."

What about a piston upper?

I dunno, but I don't believe the ASA upper is piston compatible. Could be wrong on that, though. But I don't like pistons because they add weight out front, on a rifle that is already front heavy due to the can. They also add unnecessary expense, and unnecessary complication. It don't get much simpler than a tube lined up with a hole.

ETA: Now that I think about it, though, a piston is about the only thing I don't have on one AR or another. I've got two projects on the drawing board right now. One is a purpose-built 3G rifle, which will definitely be DGI. The other is a short 5.56 upper for my registered lower so I can shoot it a bit more economically. THAT might get the piston treatment.
« Last Edit: December 05, 2012, 08:52:19 PM by Outbreak »
TexasOutbreak

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Harm

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Re: Side Charging AR-15 upper recievers
« Reply #10 on: December 05, 2012, 11:09:56 PM »
Outbreak - where is the gas escaping from?
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Outbreak

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Re: Side Charging AR-15 upper recievers
« Reply #11 on: December 05, 2012, 11:13:56 PM »
Not sure. If it's coming out the slot on the side, which I suspect, there's not much I can do. Man up and deal, I guess.

I gotta load some more ammo before I can test any further. I'm thinking about masking tape on different openings and slots until it stops. Whichever piece of tape stopped it tells me where the leak is.
TexasOutbreak

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I'm glad that your chains rest lightly upon you. --JesseL

Harm

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Re: Side Charging AR-15 upper recievers
« Reply #12 on: December 05, 2012, 11:21:36 PM »
Good plan.  Let is know how it works.
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Re: Side Charging AR-15 upper recievers
« Reply #13 on: December 06, 2012, 12:30:12 AM »
There was something Larry Vickers said on a different forum regarding people asking whether they should go DGI or Piston....

He said that if you answer yes to these, you should look into a piston.

* Is the gun going to be shorter than 14.5"?
*Is the gun going to be run suppressed most of the time
*Will it need to handle a wide variety of loads.




So I brought up the piston due to the second point.  I guess it echoes with me because I bought that book about the OBL raid.  In it, they talk about primarily using an HK-416 with a can slapped on it most of the time.  IIRC, they had 10" uppers.

I'm just trying to offer suggestions is all.
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Outbreak

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Re: Side Charging AR-15 upper recievers
« Reply #14 on: December 06, 2012, 12:37:29 AM »
I actually meet two of LAV's criteria, since that barrel is 9". Variety of loads applies, too, since I have loads from 115gr to 220gr.

Still, more weight, money, and complication than I care to embrace when the original system ain't broke.
TexasOutbreak

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I absolutely despise Glocks. That's why I only own two.

I'm glad that your chains rest lightly upon you. --JesseL

Canthros

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Re: Side Charging AR-15 upper recievers
« Reply #15 on: December 06, 2012, 01:38:50 AM »
Once upon a time, Addax Tactical was offering ASA sidechargers that were using the long-travel piston system sold by PWS (I'm not sure why they stopped, but PWS no longer offers conversion kits, which might be related). The ASA sidecharger requires the bolt carrier be modified to give the charging handle something to hook into, but (apparently) it doesn't necessarily interfere with a piston.
Kentucky

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Re: Side Charging AR-15 upper recievers
« Reply #16 on: December 06, 2012, 08:12:34 AM »
Still, more weight, money, and complication than I care to embrace when the original system ain't broke.
I'm inclined to agree, but some people think it is...



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only1asterisk

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Re: Side Charging AR-15 upper recievers
« Reply #17 on: December 06, 2012, 02:01:02 PM »
I actually meet two of THE LAV's criteria, since that barrel is 9". Variety of loads applies, too, since I have loads from 115gr to 220gr.

Still, more weight, money, and complication than I care to embrace when the original system ain't broke.

Fixed it for you.  The LAV would appreciate it if you didn't leave the "the" off the front.  The only person permitted to leave off the "the" from "The LAV" is the LAV when referring to himself in third person. 

JesseL

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Re: Side Charging AR-15 upper recievers
« Reply #18 on: December 06, 2012, 03:16:24 PM »
There was something Larry Vickers said on a different forum regarding people asking whether they should go DGI or Piston....

He said that if you answer yes to these, you should look into a piston.

* Is the gun going to be shorter than 14.5"?
*Is the gun going to be run suppressed most of the time
*Will it need to handle a wide variety of loads.
I actually meet two of LAV's criteria, since that barrel is 9". Variety of loads applies, too, since I have loads from 115gr to 220gr.

Still, more weight, money, and complication than I care to embrace when the original system ain't broke.

Getting away from .223/5.56 certainly changes the equation. A less overbore round will see lower gas pressures for a given distance from the breech, but the gas volume available from a similar sized case won't change so much. As far as the gas system is concerned a bigger bore is very similar to a longer barrel.
Arizona


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