Quote:
Originally Posted by Kos-Mos
There are supposed to be 3 set-screws in the holes of the outerbarrel. Not to support the inner, but to fit in the slots in the receiver and prevent the rotation.
Normally, you would simply torque it very hard to keep it there (on real rifles).
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sorry, nope! RS barrels have a pin press fitted at the 12 O'clock position on the barrel extension section. it serves two functions.
1 - lock the barrel extension in place to prevent it from unthreading.
2 - an indexing point for the upper receiver. there is a corresponding notch cut out on a RS upper that the pin slots into, to prevent the barrel from rotating.