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Posted: 4/23/2010 7:30:19 PM EDT
| Just wondering if this is a worthy mod? I have the roller cam on the way and was going to add the bolt spring that a very nice AR-15 member is giving me. Any reliability issues or potential issues? AA website says its use reduces cam pin wear. |
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I got cam pin wear with it there regardless as many people have so there's no knowing how much it helps. Someone other than the manufacturer would need to run a new Adams setup rifle with fresh receiver with it and one without it to compare I think and that's not likely to happen. The roller cam is the biggest reducer I've found. The spring is a small plus I think, but at what Adams seems to currently be charging for shipping on a simple spring it's not worth it in my opinion. Lots of piston AR's have been running without it for a long time. |
| I just built a 7.5" with an Adams kit,no problems with anything yet. I have a POF pin in it as well. Just the other day,while cleaning up my bench,I went to put the Adams box away in one of my file cabinets when I noticed I had an extra spring in the box. It was then I realized it was the bolt return spring,I had forgot to install it! The gun ran fine without it,I took it apart to install it and found no wear issues yet but its only at about 500 rds so far. I put the spring in anyways,figured what the hell,it can't hurt even though it functioned fine without it. |
A lot of piston guys have already spent loads on their rifles. What's another $5.  I know a lot of guys who've gotten the POF roller cam along with an AA bolt spring. It's supposed to do more than reduce cam pin wear like simulate the way a DI bolt unlocks from the barrel extension along with reducing carrier tilt.
" What this seemingly innocuous little spring does is to retard the disconnect time long enough to reduce backpressure in the system. It also helps your bolt disengage from the barrel extension cleanly instead of being ripped out by the sudden rearward travel of the BCG as it’s pushed by the rod assembly. In essence the spring mimics the more smoothly running gas systems of old without all the fouling that gets shot back into the upper." http://www.tactical-life.com/online/guns-and-weapons/adams-arms-pdw-556mm/ |
| On an Osprey system the bolts rings come off so there is no resistance from the bolt in the carrier so its not getting ripped out and the fact I have no extension tube wear trells me there is no tilt.I have added a pof roller cam pin so theres even less drag making the spring unecesary.Maybe its more of an issue on other systems. |
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Quoted:
On an Osprey system the bolts rings come off so there is no resistance from the bolt in the carrier so its not getting ripped out and the fact I have no extension tube wear trells me there is no tilt.I have added a pof roller cam pin so theres even less drag making the spring unecesary.Maybe its more of an issue on other systems. The gas rings are removed in the Adams Arms kit as well. The bolt spring wouldn't function or do its job if you kept the gas rings in there. |
| Asssembled my first AR with an Adams Arms piston kit, POF roller cam, bolt spring and removed bolt gas rings. If you tell me what to look for I'll be happy to take pictures of the inside of the receiver after I get a few hundred rounds through it. It's still unfired. |
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