Armaspec AR-10 Stealth Recoil Spring Problems

[mxjoe35]

So I am running a rifle length buffer, with the Armaspec AR10 Stealth Recoil Spring and spacer. I was having problems with it not going all the way into battery or maybe it went in and bounced out!? But I was getting lite primer strikes randomly. I tried a different bolt, same problem. I removed the buffer retainer pin to allow it to put more pressure on the BCG, same problem. I know you can get shims, but the buffer actually sticks out further than the stock buffer, so it shouldn't need shimmed. Any idea what is going on? FYI when I put the stock buffer and flat wire spring into the rifle, it runs like a champ!

 

[USK308]

Is the buffer weight of the Armaspec the same as the stock buffer?

 

[mxjoe35]

Armaspec says the buffer equivalent wait is 5.7 ounces, the one in it is 5.4 ounces.

 

[USK308]

If you have a postage scale or similar, I would recommend weighing the Armaspec…just to rule out incorrect buffer weight!

If the stock buffer weight works and rifle cycles properly…that is the weight your rifle needs for a buffer weight, to balance the gas vs. mass and allow the rifle to properly cycle.

 

[mxjoe35]

It would require me to disassemble the Armaspec buffer system, which I don't really want to do. I am just going off of their website, which says equivalent weight of 5.7 ounces. The rifle when it fires cycles properly. It ejects at 3 oclock, just like the other buffer. When I pull the charging handle it feels similar in resistance, maybe even a little more. Because I thought the spring may be under powered and it allowed the bolt to bounce out and not keep it in battery. But it has good resistance. So I am not sure!?

 

[msgriff]

I'm assuming that you're running the matching Aero upper, but I'd still check that the tail of the carrier is centered on the head of the SRS buffer. Also, look for any guide rod interference inside the bore of the carrier.

 

[mtrmn]

FYI when I put the stock buffer and flat wire spring into the rifle, it runs like a champ!

Just ditch the gucci parts and run this. KISS

If the buffer retainer is correctly positioned, it should never contact the buffer when the gun is assembled. Therefore removing it would not have any effect on the buffer going into battery. If the buffer is in contact with the carrier when in battery, that's all it can do and no amount of imaginary re-positioning can make it work better. The purpose of the internal buffer weights being able to move is to give the BCG a secondary followup tap after returning it to battery. This helps alleviate any bolt bounce.

ETA: It ain't just the WEIGHT of the buffer that does the work, but that second 'forward assist" from the internal weights helps as well. I don't know anything of the Armaspec buffer, but if there are no moving weights inside that may well be your problem. JMO and worth every penny you paid for it

 

[mxjoe35]

I'm assuming that you're running the matching Aero upper, but I'd still check that the tail of the carrier is centered on the head of the SRS buffer. Also, look for any guide rod interference inside the bore of the carrier.

I am running an Aero upper and lower. I will check to see if there is any interference. It seems to cycle smoothly when I pull the charging handle, but I need to do some more testing.

 

[mxjoe35]

Just ditch the gucci parts and run this. KISS

If the buffer retainer is correctly positioned, it should never contact the buffer when the gun is assembled. Therefore removing it would not have any effect on the buffer going into battery. If the buffer is in contact with the carrier when in battery, that's all it can do and no amount of imaginary re-positioning can make it work better. The purpose of the internal buffer weights being able to move is to give the BCG a secondary followup tap after returning it to battery. This helps alleviate any bolt bounce.

ETA: It ain't just the WEIGHT of the buffer that does the work, but that second 'forward assist" from the internal weights helps as well. I don't know anything of the Armaspec buffer, but if there are no moving weights inside that may well be your problem. JMO and worth every penny you paid for it

No I get it, what you say is all legitimate! I just wanted to try on because guys swear by them. JP has made a killing of of theirs and JP makes quality stuff. But I will be damned if I can get this thing to work. I will keep tinkering, but for now it's my David Tubbs flat wire spring!

 

[Cnelson34]

I know this is an old post, but I had the same issue as above. I struggled trying multiple things/ parts, and just tonight found this post with the exact same issue. I’m just hoping to help anyone else out. I struggled through a few different barrels due to this buffer issue. I was initially attempting to run a 22-250 suppressed. It intermittently failed to go into battery. I had the bolt matched to the barrel, and still had the same issue. Assumed it was something wrong with the settings, headspace, maybe just needed to wear in, or a feed issue due to the body taper of 22-250. Ended up moving that barrel down the road. Went to 243 briefly, and the problems followed. Ultimately I figured it out one day with the rifle in 6GT configuration. The ejector had enough force/ the buffer had too little force to get the bolt all the way into battery. I made a shim to apply more pressure for the small buffer spring. I have not had an issue since. I wish I would have dumped the buffer sooner, but running suppressed I didn’t want to give it up.