Hey that’s some nice information. I never seen that kind of damage to my buffer yet, but now I know what to look for when and if it ever happens. Thanks!
Mine turned out to be a very rough bur on the carrier shoulder. My buffer face looked just like the photo you showed @4:24. I ran 2000 grit automotive sandpaper over the edge and got a new buffer and the problem went away.
If you're running into the issue of the buffer retaining pin hole being out of spec, my recommendation is to pick up an Armaspec silent buffer, pull the retaining pin and spring, and carry on as usual. Just make sure you drop some CLP in your buffer tube between cleanings. You absolutely can run your AR without that retaining pin, even with a standard buffer and spring. Your hammer will catch the buffer when you open up your AR. The fun part is getting it back together.
@@Anreeewww you don't need a retainer pin for captured buffer systems. That allows them to keep constant pressure on the BCG, and the heavier buffer weight keeps it from bouncing back out of battery.
@Anreeewww removing the pin also keeps the pin from getting marred up or marring up your buffer. If there's no pin, it doesn't matter if the buffer retaining pin hole is in the wrong spot. 🤷♂️
Just installed an offset retainer pin from Galloway P. Will run the weapon this week to see if it corrected the light ring on the buffer thatwashappening.
I had a Ruger AR-556 rifle that had both a non-flush carrier tail and a misplaced buffer detent hole! It was digging a circular ring into the buffer like no tomorrow. VERY disappointed in the quality of that rifle.
That off set detent, I just got one for my .308 build, $21.00 at Galloway Precision, not sure I needed it and I certainly do not like how it sits in there, kind of tilted and it seems too short, barely catches the edge of the buffer
I've had the problem with the buffer face hitting the retaining pin on a Ruger MPR from the factory. With about 500rds it actually stopped working. I've changed the entire bolt carrier and buffer and it hasn't helped. The lower seems out of spec because the detent holes on the take down pins are drilled about 1/32" off center and the pins have to be removed with a punch and hammer. I need to send it back.
I have one that is leaving the rain around the outside of the buffer and couldn't figure out why I'm glad I found this video but I've had it for right at a year so I can't send it back I was thinking about just beveling the edge of the buffer where it would not contact the pen anymore but I've also ran probably 2000 rounds through it and haven't had any issues other than leaving a ring on the buffer
Hello, hope you're doing well. Recently purchased an fx9 secondhand, the person claimed to have only shot ten rounds and decided to sell due to being a left handed shooter (so they claim, probably lied about both). Unfortunately upon inspection after purchasing it I noticed marring on the buffer face from what I've discovered to be a bur on the bcg. This is the first buffer tube utilizing firearm I've purchased so the concepts are still new to me. I plan on hopefully sanding or polishing out the bur, but are the indents/wear on the buffer going to be an issue? Do I now need to replace the buffer? Thank you for the video, it's provided some insight.
Well, as I explained, if the marks look like scratches and sanding, it’s not a particularly big deal. Likely a burr. Where the problem lies is if there is ding marks on the edges of the face. Consistent with the buffer face hitting the retention pin. This leaves small concave notches around the rim. If that’s the case, the lower is likely out of spec and at some point will shear the retention pin off which can be a big problem.
Great video man, i would like to ask if it is normal for the nitride coating to wear off the back of the bcg wear it contacts the buffer? Im seeing some wearing of the coating where its hitting the buffer weight and leaving marks on it as well. Any info would be greatly appreciated.
Had a x39 upper on a lower with an h3 and the buffer face is scratches up pretty good but now upper is gone and a new ddm4v7p is on it with hopefully better in spec parts
Is there any way to fix the problem if your retaining pin is in the wrong spot? My buffer tube looks exactly like the one at @1.53. And I’ve only shot maybe 400 rounds through the rifle.
You can buy a recessed detent pin. I am uncomfortable with calling it a “fix” and would usually advise to replace the lower with one that’s in spec but as I have not personally had one, I can not say with experience how it does addressing the issue. But from what I have read, it seems to resolve it. If I had an SBR I paid a stamp for, I would go this route, but for a standard lower I would expect the manufacturer to replace it.
Should the buffer face stay unmarked when things are right or does the marked ring around the edge always mean an out of spec detent hole lower? Thanks
@@Allenmar73 ehh. Hard to say. But I would say that it’s more common than not to have an out of spec lower with the pilot hole drilled in the incorrect location than the shorter carrier. Especially if it’s a quality carrier as any place with good QC is gonna measure before sending them out. At least in batch. But it does happen. BCA and occasionally toolcraft being the usual suspects.
Avoid 17 Design lowers... they have suffered from this issue. There's a reason they're no longer in business. Brownells must have bought a truckload, because they can't give them away.
Thank you have a custom 9mm AR from breachers customs, the issue im having is after I shoot the first round it chambers the next but give me a light primer strike. Does not fire the second round ever. I also ran into another issue with the charging handle getting stuck after that first round fires, took it apart and my buffer detent is bent and my buffer weight is not only scared but dented. I want to remove my buffer detent completely do you think this will fix my issue?
You appear to have more than one issue. To fix the issue of the buffer getting beat up, you will need to replace the lower. It’s out of spec. Assuming, of course , you measured the bolt carrier and it exceeds 6.67” in length. Second, from the sound of it, you have an issue with the fire control group. Quite possibly a backwards hammer spring. Take the entire trigger assembly out and remove all springs. Then reassemble making sure to orient all springs (trigger, hammer, and disconnector springs) the correct way. One of them is likely off. This can cause random light hammer strikes, dead triggers, and even bust shots. As far as the charging handle getting stuck, I’m not entirely sure. I would have to take a look at what’s going on and see it for myself before I could give an opinion.
@@jim18555 no problem. 👍🏻 And definitely reach out to them. There a lot of variables with an AR9 platform. If they’re worth their salt, they should square you away. Especially if the lower is gonna need replacing
Yeah. It’s fine. Once it wears down to a certain degree, it won’t wear further and there’s no known case that I’m aware of after extensive research that there can be an issue with a worn buffer face. The biggest issue is the retainer pin breaking off
First you need to determine what the underlying issue is based on the type of damage. Pilot hole in the lower out of spec or burr on the rear of the carrier. Or rarely, both. If it’s marring occurring above the detent and possibly some scratches on the face, it’s a burr. If there is concave damage from buffer pin strikes, around the rim , it’s an out of spec lower
It’s damage from the buffer pin strikes around the rim. I’ve contacted the manufacturer and awaiting for a response. Diamondback has lifetime warranty and I’m hoping to send it in for repair. Thank you for your wisdom and prompt response.
That means that your buffer is bottoming out in the tube on recoil. Could be a combination of things. Rifle buffer in carbine tube. Under sprung. Out of spec tube that’s too short. Rifle tube and buffer with a carbine spring. Etc. I’d have to examine your specific rifle to make that determination
I bought a kynshot hydraulic buffer for my ar15. When i received it, i noticed that it was intended for a foldable stock, i have a fixed stock. What will happen if i use this buffer?
No no sir Yours are not in spec. The ar parts kit I slapped together from them has been a dream. I stopped counting rounds around 6k. Steel brass aluminum case ot don't give a damn
I learned about this problem the hard way. Now its one extra point to inspect when shopping for a new AR.
Hey that’s some nice information. I never seen that kind of damage to my buffer yet, but now I know what to look for when and if it ever happens. Thanks!
Minimum TDP is 6.667
I never thought about the channel bur and I will keep an eye out for it. Good video, very helpful..
This is great info, I appreciate the detailed explanation!
Agree 👍 good information!
Mine turned out to be a very rough bur on the carrier shoulder. My buffer face looked just like the photo you showed @4:24. I ran 2000 grit automotive sandpaper over the edge and got a new buffer and the problem went away.
If you're running into the issue of the buffer retaining pin hole being out of spec, my recommendation is to pick up an Armaspec silent buffer, pull the retaining pin and spring, and carry on as usual. Just make sure you drop some CLP in your buffer tube between cleanings.
You absolutely can run your AR without that retaining pin, even with a standard buffer and spring. Your hammer will catch the buffer when you open up your AR. The fun part is getting it back together.
But how does Armaspec buffer resolve this problem?
@@Anreeewww you don't need a retainer pin for captured buffer systems. That allows them to keep constant pressure on the BCG, and the heavier buffer weight keeps it from bouncing back out of battery.
@Anreeewww removing the pin also keeps the pin from getting marred up or marring up your buffer.
If there's no pin, it doesn't matter if the buffer retaining pin hole is in the wrong spot. 🤷♂️
Thank you for the info
Just installed an offset retainer pin from Galloway P. Will run the weapon this week to see if it corrected the light ring on the buffer thatwashappening.
I had a Ruger AR-556 rifle that had both a non-flush carrier tail and a misplaced buffer detent hole! It was digging a circular ring into the buffer like no tomorrow.
VERY disappointed in the quality of that rifle.
That off set detent, I just got one for my .308 build, $21.00 at Galloway Precision, not sure I needed it and I certainly do not like how it sits in there, kind of tilted and it seems too short, barely catches the edge of the buffer
I've had the problem with the buffer face hitting the retaining pin on a Ruger MPR from the factory.
With about 500rds it actually stopped working.
I've changed the entire bolt carrier and buffer and it hasn't helped.
The lower seems out of spec because the detent holes on the take down pins are drilled about 1/32" off center and the pins have to be removed with a punch and hammer.
I need to send it back.
Dope vid
Thank you sir
Good info. Thanks
I have one that is leaving the rain around the outside of the buffer and couldn't figure out why I'm glad I found this video but I've had it for right at a year so I can't send it back I was thinking about just beveling the edge of the buffer where it would not contact the pen anymore but I've also ran probably 2000 rounds through it and haven't had any issues other than leaving a ring on the buffer
Hello, hope you're doing well. Recently purchased an fx9 secondhand, the person claimed to have only shot ten rounds and decided to sell due to being a left handed shooter (so they claim, probably lied about both). Unfortunately upon inspection after purchasing it I noticed marring on the buffer face from what I've discovered to be a bur on the bcg. This is the first buffer tube utilizing firearm I've purchased so the concepts are still new to me. I plan on hopefully sanding or polishing out the bur, but are the indents/wear on the buffer going to be an issue? Do I now need to replace the buffer? Thank you for the video, it's provided some insight.
Well, as I explained, if the marks look like scratches and sanding, it’s not a particularly big deal. Likely a burr. Where the problem lies is if there is ding marks on the edges of the face. Consistent with the buffer face hitting the retention pin. This leaves small concave notches around the rim. If that’s the case, the lower is likely out of spec and at some point will shear the retention pin off which can be a big problem.
Great video man, i would like to ask if it is normal for the nitride coating to wear off the back of the bcg wear it contacts the buffer? Im seeing some wearing of the coating where its hitting the buffer weight and leaving marks on it as well. Any info would be greatly appreciated.
Yes. Entirely normal
@@theuncouthtruth9551 ok cool thank you for the reply i appreciate that!
Had a x39 upper on a lower with an h3 and the buffer face is scratches up pretty good but now upper is gone and a new ddm4v7p is on it with hopefully better in spec parts
Brownells has the pin now for 12.99! It is a new product as per their website!
On my AR-15 I pull the charging handle back and this started to happen. It won't go back when I pull the charging handle. Why does that happen?
I have a huge dent on the side of the buffer. Looks like it's from an impact from the detent
Is there any way to fix the problem if your retaining pin is in the wrong spot? My buffer tube looks exactly like the one at @1.53. And I’ve only shot maybe 400 rounds through the rifle.
You can buy a recessed detent pin. I am uncomfortable with calling it a “fix” and would usually advise to replace the lower with one that’s in spec but as I have not personally had one, I can not say with experience how it does addressing the issue. But from what I have read, it seems to resolve it. If I had an SBR I paid a stamp for, I would go this route, but for a standard lower I would expect the manufacturer to replace it.
I bought a rifle that had the wrong spring. Carbine length in a A2 stock😮
Should the buffer face stay unmarked when things are right or does the marked ring around the edge always mean an out of spec detent hole lower? Thanks
Very light etching is normal. No wear at all is pretty uncommon. But if it’s out of spec, it’ll be pretty apparent
@@theuncouthtruth9551 .. Thanks for the reply. On your carrier measurements, you got me wondering how common is it to have a short out of spec BCG?
@@Allenmar73 ehh. Hard to say. But I would say that it’s more common than not to have an out of spec lower with the pilot hole drilled in the incorrect location than the shorter carrier. Especially if it’s a quality carrier as any place with good QC is gonna measure before sending them out. At least in batch. But it does happen. BCA and occasionally toolcraft being the usual suspects.
Stick with Toolcraft and you will be GTG.
Avoid 17 Design lowers... they have suffered from this issue. There's a reason they're no longer in business. Brownells must have bought a truckload, because they can't give them away.
Thank you have a custom 9mm AR from breachers customs, the issue im having is after I shoot the first round it chambers the next but give me a light primer strike. Does not fire the second round ever. I also ran into another issue with the charging handle getting stuck after that first round fires, took it apart and my buffer detent is bent and my buffer weight is not only scared but dented. I want to remove my buffer detent completely do you think this will fix my issue?
You appear to have more than one issue. To fix the issue of the buffer getting beat up, you will need to replace the lower. It’s out of spec. Assuming, of course , you measured the bolt carrier and it exceeds 6.67” in length. Second, from the sound of it, you have an issue with the fire control group. Quite possibly a backwards hammer spring. Take the entire trigger assembly out and remove all springs. Then reassemble making sure to orient all springs (trigger, hammer, and disconnector springs) the correct way. One of them is likely off. This can cause random light hammer strikes, dead triggers, and even bust shots. As far as the charging handle getting stuck, I’m not entirely sure. I would have to take a look at what’s going on and see it for myself before I could give an opinion.
Thank you. I'm digging into it. I greatly appreciate your response.
@@jim18555 no problem. 👍🏻 And definitely reach out to them. There a lot of variables with an AR9 platform. If they’re worth their salt, they should square you away. Especially if the lower is gonna need replacing
Right on, I will reach out for sure. I didn't pay $2400 for my gun, not to work. I appreciate you.
Thank for the video brother
Thanks man! I thought it would be helpful info to put out there 👍🏻
@@theuncouthtruth9551 it really did help as always.
Do any issues arise from the damaged buffer face or is still good to run after resolving the issue that's caused it?
Yeah. It’s fine. Once it wears down to a certain degree, it won’t wear further and there’s no known case that I’m aware of after extensive research that there can be an issue with a worn buffer face. The biggest issue is the retainer pin breaking off
I’ve had this issue. Someone told me to try a lighter spring/buffer. Before I buy it, would you agree?
No. It will not change anything. You were given incorrect information.
First you need to determine what the underlying issue is based on the type of damage. Pilot hole in the lower out of spec or burr on the rear of the carrier. Or rarely, both. If it’s marring occurring above the detent and possibly some scratches on the face, it’s a burr. If there is concave damage from buffer pin strikes, around the rim , it’s an out of spec lower
It’s damage from the buffer pin strikes around the rim. I’ve contacted the manufacturer and awaiting for a response. Diamondback has lifetime warranty and I’m hoping to send it in for repair. Thank you for your wisdom and prompt response.
Wow I have this issue big time on my ar! Now I know
Just delt with this it's my actual tube face thats ate up.
I'm hearing crickets and whispering this is very alarming
What about the rubber tip getting all crushed and ate up
That means that your buffer is bottoming out in the tube on recoil. Could be a combination of things. Rifle buffer in carbine tube. Under sprung. Out of spec tube that’s too short. Rifle tube and buffer with a carbine spring. Etc. I’d have to examine your specific rifle to make that determination
I bought a kynshot hydraulic buffer for my ar15. When i received it, i noticed that it was intended for a foldable stock, i have a fixed stock. What will happen if i use this buffer?
Buffer Retainer Pin.
Wekk done !
I shoot suppressed a lot does that have anything to do with the abuse? Like maybe just having it hit it harder than it should
It’s on a mid length gas
No. Suppressing should not make any difference.
Every time I watch this guy's videos I can't hear him.
Every PSA gun does that which I purchased. They are not in spec.
No no sir
Yours are not in spec. The ar parts kit I slapped together from them has been a dream. I stopped counting rounds around 6k. Steel brass aluminum case ot don't give a damn