Rail indexing keys to mount Streamlight TLR-1 and TLR-1HL on Tisas B9R Carry 1911 and Tisas B9R Carry DS "2011". These rail keys may work on others, but they have only been tested to mount the light to these. I used PLA+ with the print settings that work best for my printer with this filament. 0.4mm nozzle 100% solid infill .1mm layer height supports touching build plate LBRY Tags: streamlight; tlr-1; 1911; 2011