I have emailed Magpul and will call later today. Love Magpul, but would love to hear any ideas here to for sake of knowledge...
Rifle functioned perfectly with ALL mag types before install.
Build is Noveske Gen 3 Lower, VLTOR MUR-1A upper, Noveske CL 16" Mid barrel, Geissele LPK, Geissele Trig, Noveske BCG, VLTOR A5-H2 RE... runs perfect!
Added UBR-2 with A5-H2 system and setup without tube spacer as directions advise.
All GI mags GTG, ALL PMags fail to lock back.
I do not believe this is a PMAG problem
A. I'm guessing either the UBR's tube is different length and is causing this...
B. Is this a tube problem or is this gonna be a buffer weight problem? or?
C. Is this causing an over or under gassed situation/over sprung or undersprung?
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