I used to run the TLR-1 on all of my long guns, as well as pistols. Obviously there were exceptions, like the LaserMax weapon light on my J-frame because I can’t use a TLR-1. I also have two old Insight lights that I put on guns I rarely use (.22 AR and my SBR PSA AK-P), but wanted a light on them. Doesn’t tie up a Streamlight.
I had one on my TAC-14…
First/only failure on the about 8 TLR-1s that I own. It was on that TAC-14 from Jump St. I didn’t keep track of round counts when I first started shooting it, but only fired Remington 00 low recoil, Slugger and a few Slugger low recoil (POI was too far off, stuck with the regular Slugger that shot POA). Low end… 100 rounds combined. High end… 200 rounds combined.
Could it have been a bad part? Of course. But only other thing I could attribute it to is the 12 Gauge recoil.
How it was mounted… was my first iteration of the gun with no brace and OEM barrel, but it stayed in that position since. The fingerstops have been off it for some time.
Streamlight warrantied it and I put it on another long gun. Put an Inforce WML on the TAC-14 and a WMLx on my 20” 870P. TAC-14 has been Formed 1 into a SBS, and awaiting its return from refinishing (will go out for engraving once home).