which size surefire comp

[cst]

I want to put a surefire comp on my grendel...can I get the one for the 6.8 spc or the one for 7.62?

[Drifter]

yes

[WildBill3/75]

6.8 will work just fine, that's the size flash hider I use on my grendel.

[mongoosesnipe]

The surefire compensators are compatible with larger cans as well just not smaller is you can put a 30 cal can onto a 6.8 but not vise versa I would get the 6.8 mussel break and 30 cal can unless you plan to buy multiple cans and leave that one on the Grendel