Seems a little pricey for just low grade aluminum, should be titanium tbh.
Edit - I’m sure it’s not gonna erode away but frankly aluminum is cheap for a fairly pricey item. I can find brakes on eBay for 15 bucks made of stainless or carbon steel. With the variable jam nut there’s a bit more complexity but not much more. For a premium priced product it really should be grade 5 titanium, it won’t corrode like aluminum can, it will erode less and if there’s a graze it’s less likely to have serious damage and it just feels better when it’s made of a better material. If it was cheaper I wouldn’t complain but 185$ isn’t exactly cheap. Tbacs rr option costs 45$ more compared to their flat cap version and its titanium with an intricate locking ring and taper interface. This really should be a lot less or be titanium.
Does the da version have the taper interface?
I don’t have any photos of the back of one of these, but, how big is the hole? Because it should accommodate the bullet by AT LEAST .1 inches, so it should be .2 inches over bore. This is to reduce the chance of the tunnel effect where a projectile passes through a long tunnel and the gasses bounce off the projectile causing instability. Is that the case? The rr brake on the tbac is hollowed and the hole it travels through to get to the brake portion is pretty thin which is how it should be so you don’t have this effect take place.