This fiber laser engraver is perfect for my custom gun engravings of AR-15, carbine, shotgun, pistol, and short barrel rifle. Its performance and speed blew my mind away, creating crisp signs and logos in seconds. The standout feature of the STJ-50F is its outstanding accuracy and repeatability (multiple engravings are required to create a relief), which ensures complex and detailed deep engraving. The rotary attachment works great for engraving gun barrels. In addtion, the included EZCAD software is beginner-friendly, straightforward, easy to setup and use, no experience required. What I am not satisfied with is that the 12x12 inch working table is limited to those oversized engravings. I regret not thinking of buying a portable model with a handheld laser gun before purchasing it.