Not really sure which sub forum this belongs in...mods, please move if needed.
On Monday (July 3), I was running my SBR suppressed when it locked itself up tight. Bolt Carrier was unmovable half way into the RE and half way into the upper receiver. To get the BCG loose, I ended up removing the RE and knocking the bcg forward softly when a primer dislodged itself. This fixed the malfunction, but now I have concerns about the over pressure that occurred and what may need to be tweaked to avoid this happening going forward. It's possible it was a one off issue with one bad cartridge, but I have had a few issues running this particular cartridge with this set up. The intent with the rifle was for it be usable for HD, but this latest issue has me regulating this upper to range use only. Its kind of expensive for a range toy. I've got probably 600ish un-suppressed rounds fired using a wide variety of ammo and no issues since some initial fit trouble causing FTF's.
Set up is 11.5 CL barrel with .070 gas port, carbine gas system; non adjustable gas block; mil-spec carrier; A5 RE with A5H2 buffer; Surefire 556-212 suppressor. This occurred using IMI M193 from an Okay 30 rd magazine.
I would like to be able to reliably shoot 556 77gr OTM type ammo suppressed. I would also prefer not to use an adjustable gas block. Looking for advice on what adjustments to make now. H3/H4 buffer? Different carrier (like LMT-E or Gemtech adjustable)?
NC
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