Sniper-AS checks out the KWA LM4 KR7 if it is the best gas blowback rifle ever... "Hey guys, who knows GBB weapons knows KWA in any case. This brand has been known for many years in Airsoft both by their GBB weapons and their AEGs. But why should one resort to a GBB? And if you have decided for GBB, why then just a KWA? Now this question I will get to the bottom.