Caveman's Spark 1/2" Thermal Crush Washer - Choose Color
What does it do?
- Black to Bright at 131F (55c)
- Know when your barrel is too hot to safely handle or store.
- Color activates at common bullet drift temperatures.
- No more guess work.
- Insanely bright & awesome colors.
- Makes crush washers cool (at least…as cool as possible).
No more stupid:
- Hand hovering
- Barrel tapping
- Spitting (people really do this…stop it)
***Note about Installation***
If more than 180 degrees of tightening is required for timing, please use shim. Over tightening can cause damage to the Spark™ and it’s coating.