I weighed my stock buffer and it weighed 2.8 oz's. Today I replaced it with a Buffer that weighs 3.6 oz's. To windy today to go shoot but I hope tomorrow is better. I also got a NCStar QD 3/4" scope mount rail for my Sport. I have not been a great fan of NCStar but this mount rocks and I do Love being able to take it off and put it right back on. Just boresighted it and then took it off and put it back on 4 times and it seems to be holding its POA. very cool deal. pics later....

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Grover Oathkeeper

Hope it all works well for you. Let us know the effect the heavy buffer has.

I got out a better scale. The old buffer weighed 83grams or 2.92 oz the new buffer weighs 123grams or 4.33 oz's. I will shoot it tomorrow and I will make sure I give a report. As you all know felt recoil and action speed is highly subjective but it takes 10 seconds to change them so I will shoot both ways and let you know what I think. It wouldnt bother me to slow the cyclic rate down if my follow up shot is more accurate and with PDogs accuracy is the name of the game. But this NCStar scope mount I just absolutely adore....Dang I am turning into a dweeb!!!! Please someone quick come slap me!!! LOL Now where is that chart of Buffer weights?

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Grover Oathkeeper

DSCF3674.jpg DSCF3676.jpg

DSCF3678.jpg DSCF3679.jpg

DSCF3683.jpg

So did I go to a H or an H2 buffer, the advertisement just said a Carbine Buffer? And here are the pics to show the new and very much improved QD scope mount. Also whoever started talking about the small 'O' ring around the front pin block really hit the nail on the head. What little play I had is gone gone gone....anyway after church tomorrow gonna throw some lead just to see how everything works. Enjoy the pics.

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Grover Oathkeeper

So can you see the A2 front sight in the scope?

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Light, Accurate,Versatile M&P

Not even a shadow....nothing at all!!!and my mildots are distinct and clear..

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Grover Oathkeeper

I studied the buffer comparison video's and one thing I noticed was to the light side and the heavy side of the buffer weight range there was BCG bounce when sliding into battery. IMHO that would make a follow up shot less likely to be accurate so this is something that I would like to do away with on my Sport. It was really pronounced with the Hydaulic Buffer. So now I have two buffers one under 3 oz's and 1 over 4 oz's. If I want to find middle ground all I have to do is use a pin punch, remove the roll pin and swap the internal weights around is that correct?

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Grover Oathkeeper

can you explain the o ring and where it goes and what it does ?

Ok the you use a small oring around the front upper receiver connector block base to tighten up the upper to the lower, takes up the slack. The 4.3 oz buffer smoothed up my recoil and all my brass ended up in a nice small area at 4 oclock, and the follow up shot was a ton easier, would recommend it. and that scope mount is very very good. I sighted in @ 50 yards we had 18 to 23 mph winds then backed up to 100 yards. I held the center on one mildot above the center reticle and this is what I shot the rings are 1 inch apart:DSCF3691.jpg

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Grover Oathkeeper

The Heavy Buffer is awesome, felt recoil is tremendously reduced and my ammo is all landing in a pile at about 4 oclock. As you know felt recoil on an AR is really nothing anyway but the follow up shot is way easier to do. I am glad I made the jump.

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Grover Oathkeeper

Thanks for the report & excellent shooting!

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-John

I would consider this a MOPD!! (minute of prairie dog)
LOL

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Grover Oathkeeper

What heavy buffer did you use?

I bought this buffer off of eBay, it came well finished and appears to be well made. Fit perfectly and did not slap around in my buffer tube.

eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices

He also had a great price on the NCStar QD Scope rail so I bought them at the same time, plus free shipping. The advertisement said it weighs 3.5 ounces but according to my scale it weighs 4.33 ounces which puts it into the H2 category. After talking with the gentleman, he seemed to be very honest and upfront. He has a wonderful warranty policy and I would recommend this product. He told me that they all weigh the same and is changing his advertisement. For $12 dollars it is hard to beat!

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Grover Oathkeeper

Thanks for the info!
I bought one
The H2 at brownells is ~$45+shipping, $12 is great.

Let me know how it runs for you. I was totally blown away by the difference. Being disabled and somedays I cant do much of anything so I look for deals. I will look anywhere for a deal, but when it showed up and was in the H2 weight catagory I was stoked. Range report!!

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Grover Oathkeeper

Oneye- be sure to use loctite on ALL the screws and the set screw on the QD mount.

Looks really nice, and good shooting!

? about the buffer. by installing this does it affect the factory warranty? Also how easy is it to install and do you need anything special to do it? Thanks

The early part of the video here:
AR15 Collapsable Stock Removal - YouTube
Shows the removal of the buffer tube and spring on a ar15.

Easy to do imho.

Thanks, looks easy. Another question is why does this buffer help over the stock one? Is it heavier than stock and that what makes it better? I understand what you say it does just wondering why, since I am new to this stuff and trying to learn. Thanks again for the schooling.

Simple answer, a heavier buffer slows down the cyclic rate of the rifle.

This is just what I know. Others know more. I make no claims of this being 100% accurate. Other members will add to and/or correct me.

In an over-gassed rifle, it slows down the bolt's rearward rate of travel. This should help extracting the spent case from the chamber. It helps decrease the perceived recoil. It reduces bolt bounce at the end of the bolt's forward travel. Supposedly, slowing down the cyclic action is easier on the wear and tear of the rifle.

The general rule is to use the heaviest buffer that will allow your rifle to reliably complete a full firing cycle with the specific ammo you are using.

I know of four main weights of collapsible stock buffers.


Carbine Buffer. 3.0 oz as measured on my postage scale.


H Buffer. 3.9 oz as measured on my postage scale.


H2 Buffer. 4.8 oz as measured by my postage scale.

There's also an H3 buffer. I haven't acquired one to weigh on my scale yet.

There are other buffers made by manufacturers in different weights. Some in between H & H2, Carbine & H, ...etc.

I will and thanks..the new buffer really softened the action...maybe it wont shake it apart but I will use the blue loctite

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Grover Oathkeeper

what is the benefits of a heavier buffer? sorry newb question

Go up two posts.

Got the buffer in the mail today, only took 2 days.
My food scale shows its just under 4oz but its not a precise instrument.
I have to wait for my m&p 15 to get out of waiting period to try it out.

I picked up my Sport on Tuesday, but the 10 days of waiting gave me too much time to read an order stuff. haha

Thanks to this thread I ordered the buffer and got it today. Very shiny. haha. It weighs in at 4.34 oz on my digital scale. My stock buffer is 2.97 oz. One thing I noticed is that the internal weights of the new buffer rattles around a lot more than the stock buffer...makes the gun rattle when moved.

I also had time to get in (I love Amazon Prime!) a Burris PEPR QD mount, Nikon M-223 2-8x BDC scope, and Magpul MOE handguard. Still waiting for the UPS guy to deliver the Ergo pistol grip this evening...I swear mine must be the last house on his route as I never get a UPS delivery before 6:30 PM.

Can't wait to take it to the range this weekend.

Cool! Shoot a mag with the stock carbine buffer in place, then swap it out. That way you can gauge the differences in feel and ejection.

Congrats on all the new EBR accessories too.

The one I got rattles too when shaken.
I dont have it installed yet but seems it would rattle if the rifle was shaken.

The stock one dosent rattle then I guess?

I can hear the weight in the stock one slide back and forth. But it doesn't rattle.

Nope. Carbine, H, H2, or H3, they all rattle a bit. It's just more noticeable on the heavier buffers because of the presence of heavier tungsten weight(s).

So is there a reason why the weights are left to free float within the buffer?

good question other than it might be easier to get the buffer to start moving, and slow down the return action.

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Grover Oathkeeper

The weights are suppose to be loose in the buffer. It created a dead blow effect when the bolt closes, settling bolt bounce sooner. This increases reliability in full auto fire, but has no effect on semi-auto fire.

Got out to the range today. I had my son with me so I all I did was a quick sight in with the scope and we started having fun. I didn't swap buffers since I didn't want my son getting bored while I analyzed my rifle. I did see that with the heavier buffer that the cases were hitting the concrete to 4 o'clock at about 7'.

I'll save the in-depth review for a future date when I go to the range alone.