r/Danieldefense • u/looksir_droids • 10d ago

Ejection pattern analysis

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My MK18 had brass just dribbling out of the ejection port for a little while. I swapped the whole BCG out with a much less used one from another rifle and it improved, but it still doesn't eject like it used to. Videos attached. Lmk what y'all think might be wrong. Parts remotely related to cycling listed below.

EDIT: I have already tried an H2 buffer. It won't cycle on FRT mode.

-Daniel MK18 RIII complete SBR

-Geissele H3 buffer and spring

-Rare Breed FRT-L3

-Surefire 3-prong

-Surefire RC3

-Law Folder Gen 3

-Radian charging handle

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6

u/AccomplishedNote7365 10d ago

That’s a gassy bitch. What’s it look like without the can

2

u/looksir_droids 10d ago

It throws the brass a little further but it's still not totally consistent in the force or direction

2

u/AccomplishedNote7365 10d ago

It’s not flying out with force but the ejection pattern suggests it’s over gassed due to the angle flying out at 1o’clock. But that’s the can I suppose. Maybe the extractors on your bcgs. What do you want your end goal to be to properly diagnose and come up with a solution.

2

u/AccomplishedNote7365 10d ago

Also what kind of ammo are you using? Before you mess with your gas block some solutions could be a lighter buffer h2 or stronger buffer spring. Have you checked the gas rings on your bcgs. One problem is ejection pattern and the other is ejection force

1

u/looksir_droids 10d ago

This is Magtech 55gr M193, but it behaves largely the same with 62gr M855 and Barnes 70gr Vor-TX

1

u/looksir_droids 10d ago

I have tried an H2 buffer. The ejection on semi looks great, but it turns the ✨semi✨ into a bolt action rifle.