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Posted: 7/4/2025 1:54:45 PM EDT
[Last Edit: 223Wyldeone][Edited]
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I was cleaning some bolts and noticed this wear pattern on the rear seal. I have a somewhat over gassed AR-15 A2 Could this be a sign of the bolt not unlocking fast enough and sort of "bowing" the bolt in the bolt carrier creating this wear due to a too heavy of a buffer weight? Or, is this normal? I mean, it's crossed my mind that my buffer weight be to heavy and keeping the BCG and bolt forward just enough to cause this wear. For lack of better words. I am running 223 55gr, carbine gas, H2 buffer, standard spring, B King DLC BCG. 
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Will do, I'm checking other bolts that have a thousand plus rounds on them. In my mind with such a low round count the steel being cut into just seems odd. I'm most likely just overly paranoid (Overthinking) it, of the bolt not unlocking quick enough and or, not moving back in time and somewhat the bolt is teeter-tocking momentarily before the carrier actually starts to move, because this particular weapon is somewhat overly gassy. I'll keep an eye on it. Thank you!! I have check a older Delton BCG Phosphate, chrome lined, and no wear at all on the rear seal stub after 1-2k round count, except for minor finish polishing in that same area. I have two B Kings DLC BCG's, and same about round counts. Both have the same wear and both are grinding into the steel rear seal at the same spot, in two different weapons (One carbine and the other a Middy). Odd |
| That's where gas comes in from the gas tube/key and expands to operate the system. Finish gets removed there quickly. |
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I'm not adequately aluminumized for this thread. - gonzo_beyondo
CO, MI, OR - Please lobby your legislators to end discrimination against non-resident CCW permit holders
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Originally Posted By Gamma762: That's where gas comes in from the gas tube/key and expands to operate the system. Finish gets removed there quickly. I understand this, the finish gets removed and the steel gets polished smooth, not grinded away into a pot mark depression. I have checked an older Delton BCG Phosphate chrome lined (Came as factory in a Echo 316), and no wear at all on the rear seal stub after 1-2k round count, except for minor "finish mirror polishing" in that same area (Not grinding into the steel like these two). This is actually grinding into the bolts steel pot marking it leaving a definite depression. I actually have two B Kings DLC BCG's in separate weapons this one a carbine, and the other a mid length and both bolts have the same issue in the same spot (grinding into the steel, not just polishing to the steel). I can't believe B King Firearm bolts are that cheap vs a factory box weapons BCG like Delton. bazar to say the least |
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