Why the heck is this thing so expensive? http://www.brownells.com/.aspx/pid=24833/Product/AR_15_M16_KX3_FLASH_SUPPRESSOR Is there more to it than an open tube? is it any better than this? http://www.brownells.com/.aspx/sid=13016/sku/Levang_Linear_Compensator I have one of the latter, works just fine, makes my SBR much quieter... I'm just not understanding why the other one is so freaking expensive... Wanna kill these ads? We can help!