AR Sponsor
Posted: 1/2/2010 1:22:51 PM EDT
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Today I took a newly assembled upper to the range and had some short cycling problems.
It's using one of the Daniel Defense clearance barrels that I got with an FSB installed from Bravo Company. I have seen the recent thread discussing DD barrels' gas ports and that may be relevant. The gun was assembled with a JP Enterprises muzzle brake, for no other reason than I'd had it laying around for a couple of years, and the lower I put it on has an A1 stock with an Enidine buffer in it. No real plan to build a kickless AR existed, but that was the combo I took to the range. Initially it ejected spent casings, but did not feed the next round at all. Fortunately I had another gun with a standard buffer and with that it cycled 18/20 rounds. The barrel install went well and there are no apparent alignment problems and no apparent binding of the bolt carrier or gas tube. I'll try another bolt carrier on the chance that there is some leakage. One thing I'm wondering, though - since with a standard buffer it seems to be right on the feather edge of cycling properly, could a muzzle brake affect the gas charge to the system and inhibit the cycling? Other ideas are welcome. I'm hoping I can remedy it short of attacking the gas port, but I'll do that if need be. Oh yeah - ammo was M855. |
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