The Olympic Arms® AC4 Pneumatic Buffer

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The Olympic Arms® AC4 Pneumatic Buffer

Postby Globemaster » Sun Nov 21, 2010 6:06 pm

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Postby weet » Sun Nov 21, 2010 6:30 pm

are those reliable. ?




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Postby Globemaster » Sun Nov 21, 2010 6:52 pm

they have been 100 percent reliable for me! as I use (1) in my 25WSSM Upper, and the other one with a silver-body, I just picked up on a ‘trade deal’ and it’s a couple of years older; as you can see by the SN etched into the tube body #L312-05
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Postby weet » Sun Nov 21, 2010 7:07 pm

Globemaster wrote:they have been 100 percent reliable for me! as I use (1) in my 25WSSM Upper, and the other one with a silver-body, I just picked up on a ‘trade deal’ and it’s a couple of years older; as you can see by the SN etched into the tube body #L312-05






thats good news ! :)

i've never seen one, let alone use one... soften the blow ?

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Postby Globemaster » Sun Nov 21, 2010 7:19 pm

weet wrote: soften the blow?

they work quite well, and eliminate all of the ‘spring/buffer’ noise
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Postby Flyfish'n » Mon Nov 22, 2010 12:53 pm

Great Product! There is no way of confirming this, but I feel that it makes the cycle crisper, smoother, and obviously eliminates the spring noise. I just migrated mine over to a Grendel build. I wish there was way to get a carbine variety! I'd buy one in a second and I'll never put anything BUT this product in a rifle length stock.
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Postby Rattler » Tue Nov 23, 2010 8:06 am

In my book the AC4 (pneumatic recoil buffer) has a lot of benefits.

As GM posted the AC4 is worth the price if for no other reason than just to get rid of the spring noise, especially for target shooters and hunters. But it does have other more pracitcal purposes.

It does reduce recoil. We have tested it to be in the 25% range, sometimes more, sometimes less. Additionally, it changes the recoil of the rifle - it causes the rifle to recoil straight back into the shoulder more like like a gas opperated shotgun. The reason for this is that the gas cylinder is a constant rate of pressure, bleeding off as it goes. A spring is mechanuical device that increases the rate of resistance as it compresses. It is for this reason that you get so much muzzle climb with an AR, especially the carbines. What happens is that as the spring rate increases, your shoulder becomes the fulcrum , and the muzzle gets forced up. whereas the AC4 really does not doo that with its steady recoil rate.
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Postby Globemaster » Tue Nov 23, 2010 8:54 am

Rattler wrote:In my book the AC4 (pneumatic recoil buffer) has a lot of benefits.

hey Rattler or Ductapeman … what can you tell me about the earlier AC4 with the SN etched into the tube body #L312-05
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Postby Rattler » Tue Nov 23, 2010 10:39 am

Earlier model manufactured by a different air gas pistol supplier. Not much else to say really. just their in-house ID.
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Postby whtsmoke » Tue Nov 23, 2010 11:48 am

dont leave us hanging, how much?
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Postby Globemaster » Tue Nov 23, 2010 12:20 pm

Rattler wrote:Earlier model manufactured by a different air gas pistol supplier.

copy that

whtsmoke wrote:dont leave us hanging,

2010 Retail Catalog: AC4-NA Pneumatic recoil buffer ‘non-adjustable’ $54.60 … but with an OA2.org Membership Discount $42

:D
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Postby Thom » Tue Nov 23, 2010 5:20 pm

The only pneumatic buffer I have dealt with was a crumpled wreck. I don't recall the manufacturer or reseller but I would assume they have a common source. I have no idea how it was damaged (or if I knew I have forgotten) but the owner had purchased it damaged "As Is" with a Bushmaster lower. The tube was collapsed and the ram was bent, gotta be a good story there somewhere!
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Postby whtsmoke » Tue Nov 23, 2010 6:15 pm

Thank You :)
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Re: The Olympic Arms® AC4 Pneumatic Buffer

Postby WolfmoonCT » Wed Aug 07, 2013 4:47 am

I know this is an old thread, so sorry in advance. After buying my house, I really didn't hit the range much for a few years, and I hadn't loaded any ammo for my Oly UM in a LONG time. I finally took it out yesterday, and forgot how much of a pleasure it is to shoot it. But I'm guessing the AC4 is no longer in production? I'd love to put one in my K30R that has a standard A2 buttstock on it. Does anyone else make a similar one?
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Re: The Olympic Arms® AC4 Pneumatic Buffer

Postby Globemaster » Wed Aug 07, 2013 9:41 am

WolfmoonCT wrote: I'm guessing the AC4 is no longer in production?

I didn't see them in the 2013 Catalog either; so I sent Rattler a message via FB

WolfmoonCT wrote: I'd love to put one in my K30R that has a standard A2 buttstock on it. Does anyone else make a similar one?

Enidine Defense manufactures a few models; but I'm not sure if they make anything for the rifle lenght tubes?




I got this message from Rattler via a FB/IM

We do still have some left, but will not be continuing the product. it has been released back to the original patent holder that we worked with to develop them.
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Re: The Olympic Arms® AC4 Pneumatic Buffer

Postby WolfmoonCT » Wed Aug 07, 2013 9:44 am

I may have to see how much they want for 1 or 2.. I have a M4 with a non collapsible stock (thanks CT) that could use one too...

How does $30 a piece for 2 sound Rattler? :)

And that K30 upper you sold me years ago, with Wolf ammo, groups at like 1" at 100 yds. Some day I'll see how it does with custom loads.
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Re: The Olympic Arms® AC4 Pneumatic Buffer

Postby Globemaster » Wed Aug 07, 2013 9:51 am

yup, I'd give them a call quick and find out what they have left; IIRC, I paid around $45 for mine on the Arfcom EE 'Used' ... I still have (1) left in my parts bin, but I'm planning to use it on the carbon-fiber 25WSSM, that I picked up earlier this year.
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Re: The Olympic Arms® AC4 Pneumatic Buffer

Postby Globemaster » Wed Aug 07, 2013 3:22 pm

any updated? did ya get a chance to call the Factory yet?
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Re: The Olympic Arms® AC4 Pneumatic Buffer

Postby WolfmoonCT » Thu Aug 08, 2013 2:00 am

I did. They do still have some. $54.60 each. The only problem I thought about was wether Oly would do business with me because I live in CT.. :(
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Re: The Olympic Arms® AC4 Pneumatic Buffer

Postby Rattler » Thu Aug 08, 2013 5:57 am

WolfmoonCT wrote:I did. They do still have some. $54.60 each. The only problem I thought about was wether Oly would do business with me because I live in CT.. :(

Yep, no problem. No CT prohibitions.
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Re: The Olympic Arms® AC4 Pneumatic Buffer

Postby Dstehl » Thu Aug 08, 2013 7:50 am

If Oly had this for a carbine I would have one in every one of my AR's.
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Re: The Olympic Arms® AC4 Pneumatic Buffer

Postby Globemaster » Thu Aug 08, 2013 8:27 am

WolfmoonCT wrote:I did. They do still have some. $54.60 each.

that’s not a bad price, considering how well they perform :thumbs up:

Dstehl wrote:If Oly had this for a carbine I would have one in every one of my AR's.

IIRC, at one time they had a pneumatic buffer system (or similar) that would work on both a rifle and carbine system; I think it was offered in some of their older catalog’s.
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Re: The Olympic Arms® AC4 Pneumatic Buffer

Postby weet » Sat Aug 17, 2013 7:39 pm

i would love to try one in my rifle/carbine stock.

for now I'm going with david tubbs flat wire recoile spring..and H2 orH3 buffer.
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Re: The Olympic Arms® AC4 Pneumatic Buffer

Postby 7 Foot Jumper » Fri Aug 23, 2013 5:08 am

Huh, this explains much. I've long been a user and fan of the AC4, with the exception that every couple years they would seem to lose their charge a bit. Hasn't been a problem as Oly's lifetime warranty made exchange a snap. However, a couple months ago my hunting/shooting buddy wanted to exchange his and was told Oly will no longer be doing that. I do hope they re-enter the market under whatever company helped produce them originally, I really like the way it works in my guns with rifle stocks.

Also, the Enidine is nothing like this. It is a replacement for your actual buffer, that works in conjunction with your buffer spring. I've never seen a unit like oly's AC4 that would work in a carbine stock. I am running an Enidine in my .308 AR currently, but have an adjustable gas block in it that was added because my rifle was over-gassed, and the Enidine is lighter than a standard buffer, resulting in damaged rims. To those looking at replacing their buffers with H2, H3, etc... Really look into adjustable gas blocks! They will solve the problem on the front end, and reduce recoil, and can be had for similar cost to many of the Hx buffers out there.

http://www.majorpandemic.com/2012/06/all-about-adjustable-ar-gas-blocks.html
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Re: The Olympic Arms® AC4 Pneumatic Buffer

Postby Globemaster » Sat Aug 24, 2013 5:13 pm

looks like JP Enterprises makes a device; that will fit both the Rifles, and the Carbines

web link >>> http://jprifles.com/buy.php?item=JPSCS-15

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