BadaBing Pictures talks about the Umarex/WE-Tech G3 GBBR in this video with a slam firing issue. This G3A3 GBB rifle is fully licensed by H&K with a receiver that is made completely from stamped steel, which gives it a high level of durability. The receiver is also adorned with H&K G3 markings, which adds to the gun's authenticity. The realistic blowback functionality of the gun is further enhanced by the full-travel bolt assembly. This gives the gun a very realistic feel when it is fired.