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AR 15 300 Whisper Not Cycling/Ejecting
Hello I have a new build(SSK)
AR 15 300 Whisper Matchgrade Upper - Barrel length 10"
AAC Cyclone Suppressor
RRA Lower Receiver Lar-15
20 Rd P Mags
Load:
9.1 H110
220 SMKHP
COAL 2.235
Gas block set for subsonic
Took Out this morning for the first time this morning and first mag cycled fine and ejected and fed round ok
2ND mag had cycling and ejection issues, no stuck rounds in barrel however half way ejected and fed.
Groups were ok for first shooting 2"-3"
Thanks in advance for help
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Threaded Mode