On my Remmy 700 I have the Atec CMM4 in 1/2" UNF. Works perfectly, is very very light and doesn't upset the balance when walking around or the POI when it heats up from more than a few shots at the range
When this one goes bang it will be replaced with exactly the same, just make sure you get the .26 cal not the .30 cal one as it will make a marginal difference on the ears.