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Was mucking around with my AICS, but it eventually got to the point where the valve knocker could no longer release any gas on any of the magazines, not just the first couple of shots on my KM Custom Parts mag.
I thought the striker spring may have prematurely worn down, so I disassembled the bolt to throw the stock spring back in there.
However, once I had the bolt apart, I noticed the spring guide had practically almost unscrewed itself all the way out. I tightened it back up, reassembled the bolt and tried firing again - flawless performance, even on the KM Custom Parts magazine.
I did a re-chrony and saw numbers closer to what I was expecting, and consistant with what I had received in my initial tests between the stock magazine and the KM custom parts upgraded magazine:
Stock:
493 fps
467 fps
471 fps
465 fps
469 fps
463 fps
464 fps
462 fps
461 fps
462 fps
KM Custom Parts, G&G Gas Connector Spring & King Arms Strike Plate
461 fps
463 fps
463 fps
459 fps
459 fps
459 fps
461 fps
461 fps
461 fps
463 fps
G&G Plunger, G&G Gas Connector Spring Test #1
387 fps
423 fps
442 fps
441 fps
442 fps
443 fps
437 fps
443 fps
441 fps
443 fps
G&G Plunger, G&G Gas Connector Spring Test #2
391 fps
412 fps
424 fps
440 fps
446 fps
453 fps
448 fps
450 fps
451 fps
445 fps
So as noticed in my initial tests of the KM Custom Parts mag, it performs extremely consistent, from beginning to end.
The stock magazine tended to shoot hot on the first shot, but follow up shots were lower with a bit more deviation.
The all G&G upgraded magazines, however, did not perform as well as my initial tests showed. Although still fairly consistent, the startup shots were a bit low. I'm still investigating whether it is the case of a weak striker spring, or if it's because the spring guide in the bolt had started to back out of the cocking piece again (It came out about 1 turn.)
I'm currently waiting for some blue loctite to cure on the threads, and then I'll reassemble with that to see the results.
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