I have around 18 Form 4's and a couple of Form 1's. The trick is to file the paperwork and forget about it. Then 6-9 months later when you've forgotten all about it, bam approved.
Also, I think E-forms is back online for at least Form 4's now, maybe Form 1's too, not sure.
I spent $11,000 on a full auto uzi.
Also haven't priced either the can or the gun but no way is it anywhere near $3.5k. Probably closer to $1600-$1800, tax stamp included depending on if he got a good deal or not.
Guessing $895 for the can, around $500 for the Glock, and $200 tax stamp. Maybe sales tax too, depending on state.