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I hate to be another Debbie Downer here, but if you are on some ragged edge where a +3% spring means the difference between reliable function and not, I would not be a happy camper. Both those uppers would be sidelined.
Something else is wrong. What is common between the rifles - magazines, ammo, what else?
Nothing is in common between the rifles. Literally nothing. The M4 just doesn't have much margin of error when you drop the bolt, IME
Further, the Noveske had much more failures with the Mil-spec Colt spring, than the Sprinco White. This suggests that yes, even a VERY SMALL difference in spring rate can matter a lot. This was over about 2,000 rounds with each spring, so not a sample size of 1, so to speak...
Keep in mind that an ounce one way or another with the buffer can keep a gun from running reliably...
Last edited by WS6; 02-04-16 at 13:42.
For what it's worth, I had issues with a Spikes T2 buffer and and a blue spring being too much for my rifle and had to return to mil spec for reliable function.
Is the issue that the bolt stops moving forward before the round has completely left the mag or is it running over the top of the round completely? (I'm just making sure I read the post correctly). Have you checked to make sure the mag is not canted in the magwell and causing an awkward angle preventing proper operation?
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It's better to be thought a fool than to open your mouth and remove all doubt.
This.
I get that WS6 isn't a dummy, but between ammo and mags, there just isn't proof of this being an A5 issue at all.
It's easy enough to put a .75" or 1" or whatever the length is spacer in the A5 system and make it a carbine system, I'd want to see that before I even remotely started to blame a specific component that a ton of people are using now.
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