The BFG (Big F-ing Gun) from Doom (and later also Quake) is one of the most powerful, iconic video game guns of all time. Youtuber Zazi Nombies loved it so much, they used a whopping 5000 (!) Lego bricks to build their own version of it and are now showing off the model in a video. The weapon is almost a meter in length and weighs around 6.5 kg.
"Our heaviest weapon yet, we build a replica BFG 9000 from Doom, entirely from 5000+ LEGO bricks! Debuting in 1993 as one of the first directed-energy weapons ever to appear in a first-person shooter, here is the Big Freaking Gun's blocky, real life replica!"
Check out the video, if you want to learn more.