This is all relative...
In anticipation for hopefully an SL8 showing up, I did buy the magazines last year when they showed up at G4C (magazine but no gun). $89.99 each for a plastic 5-rounder (native 5 rounder, not pinned).
Now that may seem like a ridiculous price for a magazine and it certainly is, but compare that to the Tikka T3x TAC A1 or CTR magazines. Those are 10 rounders, are metal, but are like $200.00 each...and so far no aftermarket alternative unfortunately and I bit the bullet and bought 3...I keep these in bubble mailers in my range bag, like they are the Faberge egg or something.
You bought single or double stack mags?
G36 P mags can be modified to work in a -4 or -5 without modifying the gun




















































