|
It is actually not uncommon though the error is usually less than 0.015. Many makers do not know where the gas port hole is supposed to be. Some of them just measure an existing barrel the best they can, and go with that. The problem is worse for gas-blocks, with I would say most makers putting the hole in the wrong location - confused by copying the M16 front sight gas block, which expects the forearm-holding metal end to be there as a shim between the gas block and the barrel. But with rails, that does not apply. This is an example of something I have commented on before, about how few gunsmiths make proper use of drawings and why I like products that are designed by Engineers and made by actual machinists (who are best to *not* be gunsmiths).
__________________
R&D for AAC
|
Threaded Mode