For the Screw...take a Die cutter and cut a slot in it. Then use a big flat head and torque it off with a bit of heat applied to the screw via a soldering iron just in case there is some "adhesive" on the thread.
The .45ACP... was my idea to put on the slide after the Spartan logo was nixed. I was the one to have it painted on the Spartan KJW's back 3 years ago to discern it from other KJW GBB's
The Marketing Director at the time, asked what does that mean? Yes, he was that gun stupid.
It was supposed to has a laser etched slide like one of these:
But the stupids in power over rode my attempted design ideas...so all I could really do to make ours "different" was to have the .45ACP put on. And to this day...I can pick it out from a plethora of other KJW products...