Cast Trunnion Ak Failure at Erin Ayers blog

Cast Trunnion Ak Failure. Ak, and i know it has a cast trunion. The pioneer arms offerings were controversial as they had a cast trunnion and some other parts issues. Appears to be one of those cast polish (pioneer, or whatever) front trunnions that have earned a reputation for failing. I open it up and sure enough the right locking lug of the bolt is sheared off, but in this one and only case, the trunnion is completely. The one on the right is polish. I was going to comment on that. Has a “2h” and “wbp”. You hear all the time to stay away from ak’s with cast trunnions, but why? It shoots well, it’s accurate, and it has never suffered a failure of any kind. The bullet guide looks to be cast into the trunnion vs a separate part riveted in place. These are the major parts that are cast on an ak (74 in this example), and when you compare a front trunnion to a cast part you can see simply by the grain of the steel that the.

Looks like cast trunnion failures are starting to show...
from www.ar15.com

I was going to comment on that. The one on the right is polish. You hear all the time to stay away from ak’s with cast trunnions, but why? These are the major parts that are cast on an ak (74 in this example), and when you compare a front trunnion to a cast part you can see simply by the grain of the steel that the. Appears to be one of those cast polish (pioneer, or whatever) front trunnions that have earned a reputation for failing. It shoots well, it’s accurate, and it has never suffered a failure of any kind. Has a “2h” and “wbp”. Ak, and i know it has a cast trunion. The pioneer arms offerings were controversial as they had a cast trunnion and some other parts issues. I open it up and sure enough the right locking lug of the bolt is sheared off, but in this one and only case, the trunnion is completely.

Looks like cast trunnion failures are starting to show...

Cast Trunnion Ak Failure Appears to be one of those cast polish (pioneer, or whatever) front trunnions that have earned a reputation for failing. I open it up and sure enough the right locking lug of the bolt is sheared off, but in this one and only case, the trunnion is completely. The bullet guide looks to be cast into the trunnion vs a separate part riveted in place. Has a “2h” and “wbp”. These are the major parts that are cast on an ak (74 in this example), and when you compare a front trunnion to a cast part you can see simply by the grain of the steel that the. Appears to be one of those cast polish (pioneer, or whatever) front trunnions that have earned a reputation for failing. I was going to comment on that. It shoots well, it’s accurate, and it has never suffered a failure of any kind. The pioneer arms offerings were controversial as they had a cast trunnion and some other parts issues. The one on the right is polish. You hear all the time to stay away from ak’s with cast trunnions, but why? Ak, and i know it has a cast trunion.

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