It happened about five times during the first couple hundred rounds and hasn't happened again, but it sure was a strange issue!
...
https://www.youtube.com/watch?v=aVuqhDr9Eec
Putting 7.62x39 and 5.56 rounds through the caliber-swapping ARAK upper receiver! Full review on TTAG here: https://www.thetruthaboutguns.com/2017/07/jeremy-s/faxon-firearms-arak-21-upper-receiver-gear-review/
Info and ordering on Faxon Firearms' website here: http://faxonfirearms.com/arak-21-upper-receiver/?avad=218749_df165835
...
https://www.youtube.com/watch?v=UvVv2hHxtdU
Dave Kenik of Armed Response examines the pros and cons of tactical lights for handguns, focusing on M3 Tactical Illuminator. Read the full review at www.thetruthaboutguns.com
...
https://www.youtube.com/watch?v=niLR4Q9SHb0
The Kimber SOLO 9mm carry gun suffers repeated FTS "thanks" to light primer strike. Read the full story at The Truth About Guns: http://wp.me/pOQae-h4B
...
https://www.youtube.com/watch?v=u38QTJn-8CA