12-14-2004, 06:48 PM
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Senior Member
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Join Date: Dec 2004
Posts: 111
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Model 1 Sales 300 whisper upper function problems
Jripper Wrote :
Quote:
I just purchased a Model 1 Sales 300 fireball upper in a 16 " CAR configuration. It looks like a well made piece, but when I went to shoot it it would not cycle the action with any of the 3 corbon factory loads (220 subsonic, 125 and 150 supersonic). It appeared that there was not enough gas pressure to make it work. I have a JP adjustible gas block on order, and a reduced poundage buffer spring. Should the JP gas block take care of the problem, or is there any other modification/change in the gas system I need to make?
The bolt locks up somewhat tight, but otherwise looks like it is in working order.
Thanks
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