So, I am thinking about buying an AR-15 kit tomorrow, but upon further research I've found some potential problems. For the upper assembly, do I need a vice block, and the special wrench? I honestly has no idea this even existed, yet alone, that it was requirement. A pricey one at that. If I was to buy the kit, would I have to purchase these tools in order to assemble the gun? It was my understanding that The whole gun could be assembled with regular/slightly irregular tools (those I have) not gun specific tools and vice blocks. Any insight would be greatly appreciated!