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Posted: 11/21/2012 8:29:59 PM EDT
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I have a LOKI WEPON SYSTEMS 6.5 Grendel upper assembly. I'm having trouble getting the wepon to cycle correct. The upper has an 18" barrel and I'm using an 6 position carbine stock. Frist trip out to the range it would fire but the empty casing was coming out of the upper in a forward direction with little force. It would land on the table near the front of the barrel and roll off the table. The empty case also had a grove in the rim from the extractor, and a small dent in the case about halfway up.I thought it may be cycleing to fast so I changed the ar15 carrier for a ar16 carrier that was heavier. I did not have a heavier buffer to try. Now the firearm will fire once and jamb on the next shell. any sugestions would be appriciated. I dont want to keep throwing parts at this problem without some advice.
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| This could be anything, bad magazines, gun needs break in time, under sized gas port, bad gas rings (highly doubtful considering you've swapped the BCG already), bad gas tube/fsb alignment, dragging hammer, etc. I would start simple, try a different mag with only a few rounds in it, soak the BCG with CLP and cycle it repeatedly, check the gas tube and gas block. After that you'll have to start looking at parts. |
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