*Do not tightening it as much as I did in this video, I over tightened it a bit. A little past hand tight is sufficient. Over tightening can damage frame and cause problems* Streamlight TLR-1 HL Installation video. The TLR-1 HL Streamlight Flashlight will work for most Double stack Glocks (19,17,45 etc) and for Sig sauer pistols, 1911, anything with an under rail or a picatinny rail. Will not work for slim like guns like Glock 43x or 48.
