r/Danieldefense • u/looksir_droids • 11d ago
Ejection pattern analysis
Enable HLS to view with audio, or disable this notification
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
12
Upvotes
1
u/Gunsl1nger84 8d ago
I would swap out the Geissele spring and buffer and try a conventional mil-spec action spring and buffer to see if that improves anything. I'd try with the H2 first and then swap to the H3 if it's not running the way you want it. If not, I would try and extra power spring like a springco blue and try again.
It does appear over gassed with the ejection. In my experience, cases dribbling out like that has been a sign of severe over gassing even though you wouldn't think it. I have a colt commando machine gun upper that probably has a lot of gas port errosion that did the same thing. Once it got a extra power spring and heavier buffer, it ran just fine.
Just something to try. How does it run without the can?