The dirty little secret of muzzle devices is that they should be optimized to specific barrel lengths. The same device will have very different muzzle movement characteristics between the spectrum of barrel lengths available. A comp on a 10.5" can over compensate badly but work perfectly on a 16". Manufacturers are doing a disservice to their customers (or they are too lame to admit they don't know what they are doing) by not disclosing their design and test parameters.
Good point.


















































