PLEASE, PLEASE, learn the difference (and the proper usage) between"Brake" and "Break"....especially when referring to things firearm related. Even more so if you are advertising or otherwise trying to sell me a product.
It is a "Thumb BREAK holster"....
And it is a "Muzzle Brake" on the end of the barrel.
Break and Brake are not interchangeable. Just because spellcheck passes it does not mean it is the right usage. Look up the definitions if you are unsure.
That is all