KD, why don't you pitch you ideas to Bogie on Bookface. He has a machine shop in his house.
Because people with machine tools in their garage have better things to do then dick around with $30 wedges. Bogie makes muzzle brakes that are only a little more time all told, and less materials cost, and sells them for $50-$75. Why take a pay cut?
If I wanted one of those myself, I would make it, but let's look at it realistically. to make a couple (i.e less then 15 or so)
Al square stock of correct size. like $5 if you can find a drop. .5 hour digging in the drops pile.
Band saw it to length, mark angle, saw angle (dealing with the fact a Bandsaw doesn't make a really nice angle.) like 15 min total.
Lock in drill press, center punch, drill and tap hole. like 15 min.
I'm gonna cheat and buy a hardened bolt. $2
Cut off head, face end, swap in lathe and turn a taper point without heating it up. 30-45 min. (depends on bolt size).
While on lathe: face, turn, knurl, and part off handle from mild steel. $1 steel stock, 15 min
Mill slot in bolt, flats, mark, punch and drill cross hole. 15 min if you have a collet block on the mill.
Mill flats in handle, mark and drill hole. 10 min
Pin handle to bolt with $.15 roll pin.
Prep wedge for coating, either abrasive blast or rotary tumble. 20 min to blast, tumble can be done while making the bolt.
Coat wedge. that one looks anodized, but just.....no. lets say prime and paint after prep, two coats, and drying time. 1hr. Could powder coat faster if you have the rig.
So.....$8.15 (ish) in parts and 2hrs and 15 or so min. Obviously the more wedges you make time goes down, and the bigger more expensive equipment you have the faster machining goes, but that's pretty close for my tools, which aren't bad for a home shop. I could make it in under an hour at work, but that's on $25,000 worth of machines.
That's why it's a $35 wedge.
