Great brake, Very nice attach mechanism
I got this to as an add on item for a Form-1 project on my .338 win mag. I ordered the 5/8 sized threads version.
After drilling out the end of the brake to 3/8" (.375") to accommodate the larger diameter bullet I mounted it to my rifle.
It looks and functions great, and best of all the threads are much more robust and stout than the 5/8 x 24 that the rifle had, and will hold up much longer.
The end cap that it goes with screws on much quicker with a lot more secure feeling. I would stop short of calling it a QD mount, but its an excellent improvement over the 24 tpi threads of my rifle.
The amount of metal from the Griffon brake contacting the matching end cap is greater than the regular 5/8 size end cap, giving it a much meatier feeling connection that is also quicker and and more durable to attach and detach repeatedly.
I also speculate that the brake, positioned in my large initial expansion chamber, has a positive effect on gas disruption.
Reviewed by: Cliff from Alaska.