
Originally Posted by
lennyo3034
Whoa Whoa Whoa...Stop shooting immediately!
The A5 buffers and standard/KAC buffers are NOT interchangeable. The A5 buffers are longer to accommodate the longer buffer tube length. If you are running a standard carbine or KAC buffer in an A5 tube, you are damaging your lower receiver. The shorter carbine buffer is not coming into contact with the rear of the tube as its supposed to. Instead your carrier key is likely hitting the top of your lower receiver. I would be willing to bet your function issues are a result of a damaged key.
If you are running the Kac buffer in a standard carbine tube, then ignore this.
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