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Posted: 10/30/2016 10:37:24 PM EDT
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Brand new PSA premium FA BCG, brand new build. If I ease the bolt forward, it doesnt lock. If I slingshot it closed, it will lock. If I have it held back by bolt catch or empty mag then hit the paddle, it sometimes may require my having to use the forward assist to get it to move one notch forward.
I moved this BCG between 4 ARs, different manufacturers, problem follows BCG. Disassemble, reassemble, nothing seems amiss. Still no joy. Anybody suggest a next step? |
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Well if you tested in four AR and all have the same problem then you have determined the problem. The BCG. I would say give PSA a call and see if they will replace it as something is wrong with it.
ETA: Don't ease it forward most will not go into battery if you ease them forward. |
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Quoted:
Well if you tested in four AR and all have the same problem then you have determined the problem. The BCG. I would say give PSA a call and see if they will replace it as something is wrong with it. ETA: Don't ease it forward most will not go into battery if you ease them forward. I thought it might come to calling PSA. I've only eased it forward in an attempt to see if there is a mechanical issue. Catches each time, same spot, but I cant see what it is that is causing it to catch. |
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Try dry fitting just the bolt carrier (No bolt, cam pin, firing pin or firing pin retaining pin) to see how it fits into the upper receiver, it should slide back / forth with nothing binding or sticking.
CY6 Greg Sullivan "Sully" SLR15 Rifles TheDefensiveEdge.com (763) 712-0123 |
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Quoted:
Well if you tested in four AR and all have the same problem then you have determined the problem. The BCG. I would say give PSA a call and see if they will replace it as something is wrong with it. ETA: Don't ease it forward most will not go into battery if you ease them forward. I agree with the first sentence, but not the second. Without a round in it it should lock very easily, if it doesn't something's wrong. |
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Quoted:
I agree with the first sentence, but not the second. Without a round in it it should lock very easily, if it doesn't something's wrong. Quoted:
Quoted:
Well if you tested in four AR and all have the same problem then you have determined the problem. The BCG. I would say give PSA a call and see if they will replace it as something is wrong with it. ETA: Don't ease it forward most will not go into battery if you ease them forward. I agree with the first sentence, but not the second. Without a round in it it should lock very easily, if it doesn't something's wrong. All of our other ARs the bolts lock smoothly, eased forward or let loose from charging handle/bolt catch paddle - except when I install this BCG in them. I haven't had a chance to gut the BCG and see if its just the carrier that is out of spec. |
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OK, removed bolt, firing pin, cam pin, and dropped just the bolt carrier into the upper. It still stuck. SO then I started to drop it slowly to see where it was catching. The gas tube and the gas key matched up perfectly, it was when the bolt carrier would contact the upper.
Red circled area shows where the BCG was starting to take material off of the aluminum receiver. That big squarish white part is bare aluminum, thanks to the BCG hitting it:  </a>" />
On top of the BCG, in the red circled area is where the BCG finish was wearing out from hitting the receiver:  </a>" />
Other side of the BCG where I noticed it was rubbing too:  </a>" />
The bolt also had an irregularity (the ejector roll pin) in that the pin wasnt installed the whole way, it looked like a bit of it was smashed flat against the bolt. PSA sent me a shipping label to send back the BCG for replacement. I think Ill be better off sending it back. |
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Quoted:
Brand new PSA premium FA BCG, brand new build. If I ease the bolt forward, it doesnt lock. If I slingshot it closed, it will lock. If I have it held back by bolt catch or empty mag then hit the paddle, it sometimes may require my having to use the forward assist to get it to move one notch forward. I moved this BCG between 4 ARs, different manufacturers, problem follows BCG. Disassemble, reassemble, nothing seems amiss. Still no joy. Anybody suggest a next step? It sounds like there is nothing wrong with your BCG. The gas rings might need a little extra lube since they are new, and the carrier still has new rough finish on it, that is why you need the forward assist every once in a while. A little shooting would smooth it right out. |
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Quoted:
It sounds like there is nothing wrong with your BCG. The gas rings might need a little extra lube since they are new, and the carrier still has new rough finish on it, that is why you need the forward assist every once in a while. A little shooting would smooth it right out. Quoted:
Quoted:
Brand new PSA premium FA BCG, brand new build. If I ease the bolt forward, it doesnt lock. If I slingshot it closed, it will lock. If I have it held back by bolt catch or empty mag then hit the paddle, it sometimes may require my having to use the forward assist to get it to move one notch forward. I moved this BCG between 4 ARs, different manufacturers, problem follows BCG. Disassemble, reassemble, nothing seems amiss. Still no joy. Anybody suggest a next step? It sounds like there is nothing wrong with your BCG. The gas rings might need a little extra lube since they are new, and the carrier still has new rough finish on it, that is why you need the forward assist every once in a while. A little shooting would smooth it right out. Ok, but after pulling the bolt etc out of the carrier, the carrier still sticks in the same spot when I drop the carrier into the receiver. I keep hoping it's just a rough finish that needs to be shot smooth, but after owning 10+ bcg and selling 100+ ARs (I work pt at a gunshop), I've never had a problem like this. My concern is, if the bolt doesn't go completely forward, could this lead to an OOB discharge? |
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Quoted:
Ok, but after pulling the bolt etc out of the carrier, the carrier still sticks in the same spot when I drop the carrier into the receiver. I keep hoping it's just a rough finish that needs to be shot smooth, but after owning 10+ bcg and selling 100+ ARs (I work pt at a gunshop), I've never had a problem like this. My concern is, if the bolt doesn't go completely forward, could this lead to an OOB discharge? Quoted:
Quoted:
Quoted:
Brand new PSA premium FA BCG, brand new build. If I ease the bolt forward, it doesnt lock. If I slingshot it closed, it will lock. If I have it held back by bolt catch or empty mag then hit the paddle, it sometimes may require my having to use the forward assist to get it to move one notch forward. I moved this BCG between 4 ARs, different manufacturers, problem follows BCG. Disassemble, reassemble, nothing seems amiss. Still no joy. Anybody suggest a next step? It sounds like there is nothing wrong with your BCG. The gas rings might need a little extra lube since they are new, and the carrier still has new rough finish on it, that is why you need the forward assist every once in a while. A little shooting would smooth it right out. Ok, but after pulling the bolt etc out of the carrier, the carrier still sticks in the same spot when I drop the carrier into the receiver. I keep hoping it's just a rough finish that needs to be shot smooth, but after owning 10+ bcg and selling 100+ ARs (I work pt at a gunshop), I've never had a problem like this. My concern is, if the bolt doesn't go completely forward, could this lead to an OOB discharge? The AR can't shoot OOB. The firing pin does not protrude enough until the bolt has twisted all the way to stopping point. If the BCG is not all the way forward, the bolt has not completed its twist. |
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