LR-308 Barrel Nut Wrench

[bigfutz]

Where can I find a LR-308 barrel nut wrench that doesn't require removal of the gas block? All I am seeing is this one:
http://www.midwayusa.com/product/294971 ... nch-lr-308

 

[bigfutz]

This appears to be about the only other option, a do-it-all... hesitant about trying to use this one with a torque wrench.
GRG AR15 WONDER ARMOR MAGIC WRENCH.223/308 MULTI TOOL https://www.amazon.com/dp/B00I2AD6TW/re ... yvb1VAZHCM