Sent my 18-1/2" 870 barrel to Mike O. to be threaded (he did a great job and fast too) and now for some reason I am having problems re-assembling (Model 870™ Express® Synthetic 7-Round).
The magazine extension seems to bottom out before the barrel is tight to the receiver; there is at least a 1/4" space left. I don't know what is up as it came apart normally but I can't seem to get it back together again (and I have taken it apart before without a problem).
Are there any words of wisdom before I humbly take it to my gunsmith for (proper) re-assembly? Here's some pics to better describe my "situation" -
1. The barrel is seated properly as seen here:
2. When seated properly, the exposed threads measure: .359
3. The thread depth on the (factory) extension - .325
So when I install the spring and attach the magazine extension, I'm left with a gap (.359 - .325 = .034).
[color=#FF0000]█[/color][color=#FF0000]█[/color][color=#FF0000]█[/color]? What am I missing here? This has got me stumped.
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