Ammo clip are extremely rare.
In the Distributions.lua and ProceduralDistributions.lua they are no or almost no clip/magazine but a lot of time you'll see ammobox listed twice.
For example, in the Distributions.lua, the "gunstore displaycase" list
"223Box", 10,
"308Box", 10,
"223Box", 10,
"308Box", 10,
I'm i right in believing it should be
"223Box", 10,
"308Box", 10,
"223Clip", 10,
"308Clip", 10,
Thanks, I hope this can help I've been loving the game for over a 1000hrs.