on their website, you have to choose between asr or maad locking mechanism. if you have a specwar, you're probably going to want the asr. if you have a saker, you'll probably want the maad option, assuming you haven't converted your saker to use the cheaper asr system.
note that the blast shield looks much better on my 10.5" sbr since the blast shield is partially covered by the rail. it looks awkward on the 12" setup above.
here's a 5.56 sbr with the specwar mount attached to the barrel
here's that sbr with the specwar 762 attached
here's the same sbr without the can but with the blast shield.
questions?
I'm the loser who bought the sico blast shield.
it comes ready to mount on my specwar flash hiders and brakes. but I bought one just to tame some of the noise from my sbrs when I'm not running a can.
I don't feel like it's a total ripoff...it works pretty well especially on the brake. lock...
I use this one for my nikon 1.5-4.5x bdc. it's called nikon spot on and it already has many 223 rounds preloaded. the only problem is that I have to adjust the velocity for a sbr barrel.
for others, I use the web based Hornady ballistic calculator.
This.
After the first pull, I use the bolt release anyway so why do I need to spend 2.5 to 3x vs. a standard upper?
If that's your thing, then more power to you. I just don't see the overwhelming need for one.