My car runs every time I turn it on too.My ejects empties outside of rifle every time it goes bang. This is actually all I care for
Try yours with 62 grain M855 and see where it ejects? The only mod to mine is a battlecomp 2.0 on the end, stock buffer/spring and 16 inch barrel.Mine ejected perfectly to the 3 o'clock as a properly built new AR should running milspec ammunition (which I do. Federal M193).
After re-profiling the barrel, cutting to 14.5 and perm attaching a flash hider is started ejected to about the 4 o'clock to 4:30 position. Typical when the dwell time has been reduced and less gas gets in the system.
This is perfect for me though as I plan on running with a suppressor which will kick the ejection back to the 2 o'clock-ish position as it up-gasses the gun which is typical for suppressors.
All of that being said, I run my MR556 upper with the HK red dot buffer and spring which is significantly heavier then a standard AR buffer and significantly stronger then a standard AR spring. To use any standard AR buffer and spring combo will result in excessive bolt speed and an ejection patten similar to starsnuffers who's gun appears to be either way overgassed or running underpowered buffer/spring combo, or even has a weak or fouled ejector spring, overly strong extractor system (added crane O ring perhaps?) or perhaps a combination of all.
I've always had similar results with M855 and M193 on ejection pattern in the past. Perhaps the 416 piston system is more sensitive to variances, but I doubt that it's that sensitive to give such a wide variation between the two to creat such disparity in the ejection pattern.Try yours with 62 grain M855 and see where it ejects? The only mod to mine is a battlecomp 2.0 on the end, stock buffer/spring and 16 inch barrel.
Negative. Frankly, there is no way to reduce your barrels gas port.Great info Grumpy, thanks.
So given the MR556 system, it seems the only thing I could do if my gun is running hot is to decrease the gas port size in the piston block?
Between 4500-5000 rounds through it only. Stock MR556 with the red dot buffer and spring, stock 16 inch barrel. I'll take the bolt down and check the o ring when I get home tonight.
I do not think this is end of operational life. My MR223 at same "mileage" had no problem with springs. I think that HK416 that shot 25.000 rounds in acceptance tests did not have them replaced as well...Your round count is high enough that both of those are nearing end of operational life.
Ordering an extra power CAR spring from Wolff spring *might* be the solution. I say *might* because I don't know for sure and am guessing that the extra power spring will be somewhat close to the HK provided spring in power.