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Posted: 8/26/2026 10:11:58 PM EDT
| I recently put in a arc fire v2 frt in my ar15. with the upper off everything works as it should, and with the upper on in semi everything works as should, but in the frt position it only fires one shot and then the hammer doesn’t reset but it cycles the round. I have a full auto bcg and h3 buffer weight. Any thoughts? |
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Is there a dimple on the primer of the new chambered round? And to be clear, when you say you have an H3 buffer, does it have an aluminum body and three sliding tungsten weights inside? |
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Originally Posted By Hunteralex: I’ll take a shot when I get home and see if there is a primer strike or not and it’s a cheap h3 buffer weight If you bought a cheap H3 - that's your problem. What you've described is behaving like you have a bounce issue. I strongly suggest you order a Tromix buffer for $39. That's the only value priced H3 that works. Barring dumb luck, to solve a bounce problem you need an aluminum bodied buffer with 3 tungsten weights providing the deadblow effect. |
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Originally Posted By Hunteralex: How would I go about fixing that? It’s an h3 buffer but it’s a cheap one also it has the milspec spring in still. Could that be an issue? You either have one of those all steel buffers that don't work for FRTs or you don't have the correct shelf cut |
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| I went ahead and ordered one so hopefully that’ll fix it. I failed to mention that yesterday when I was shooting it did fire two shots on arc mode so maybe I just got lucky and the timing lined up there and the other times the bolt is bouncing back a little and throwing the timing off? |
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Originally Posted By Hunteralex: I went ahead and ordered one so hopefully that’ll fix it. I failed to mention that yesterday when I was shooting it did fire two shots on arc mode so maybe I just got lucky and the timing lined up there and the other times the bolt is bouncing back a little and throwing the timing off? Yep, you can have one shot, or a quick burst of shots before carrier bounce kicks in. That buffer will 95% surely fix you. |
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