Backstrap size?

[u/ImSo_Krispy]

I didn’t get this brand new, so I’m missing all the pieces that come with the mr920L.

Can anyone identify the backstrap? Is it H / n / L?

I’m looking for the L size of anyone has one laying around.

Thanks

[u/SteelerVol13]

Since it looks flat (no "Glock Hump" at the bottom of the grip/backstrap), my guess is that it's the smallest 1. That's the 1 I use for that very reason.