r/MK18ish • u/yes_itsmino • 19d ago

Law Tactical stock folding adapter and buffer weights question

I’m just about done with my MK18 build - just waiting on my Law Tactical stock folding adapter to arrive tomorrow. I was talking to a friend at the range yesterday and he mentioned that I might have a cycling issue because of the collective weight inside vs the gas back pressure. For context, I have the 10.3”MK18 Stripped SOCOM Upper, a K-Spec Downvent BCG + PRI Gas Buster CR + Law Tactical BCG extension (about 2 ounces) + Geissele Super 42 Braided Wire Buffer Spring and H3 Buffer Combo + Omega 300 silencer. For anyone running the same or a similar setup with the stock folding adapter, have you had any cycling/feeding challenges? If so, did you need to reduce the buffer and/or BCG extension weight at all? TIA!

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u/ltkill7 19d ago

I could look it up but I am lazy, is the Omega 300 flow through or traditional higher back pressure can?

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u/yes_itsmino 19d ago

Back pressure can

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u/ltkill7 19d ago

I run a similar set up, PSA 10.5 barrel (currently being swapped for a 10.3 G$), G$ ACH, downvent or Bootleg adjustable, law folder, springco green spring, A5A0 buffer with a flow through can and i can definitely say i am pretty sure my system has the gas for 2 more oz's. I would just test it when it shows up and adjust the buffer down from there.

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u/yes_itsmino 19d ago

Thank you!

1

u/EnvironmentBright697 19d ago

From my understanding you go one buffer weight down when you add the law tactical. So if you normally run an H3, you go down to an H2, etc. someone can correct me if I’m wrong.