13mm to Picatinny rail adapter

I believe that it was amazon that has picatinny down to an 11mm , and I had to buy two of them to accommodate the mounts. If remember correctly that they were about $7.00 bucks each.

This should work and no scope stop needed. Opens a lot wider than you need and self centering.

https://www.pyramydair.com/s/a/BKL_3_8_or_11mm_Dovetail_to_Weaver_Adapter_4_Long_Matte_Black/2923

BKL are the best in my opinion 

Here's another budget mount it has built in drop compensation and recoil stop pin

It's been a long time but I think I used the spring loaded UTG mini adapters on my P2/HW75. They open surprisingly far. Good for when you don't want the extra height of a riser.

https://www.pyramydair.com/s/a/UTG_11mm_3_8_Dovetail_to_Weaver_Adapter_2pcs/4148

NP ....glad to help out 

The PA UTG low profile adapters may self center on a 13mm dovetail but what about the rings that clamp above them are They self centering as well? They won't be able to close properly since the UTG gets wider at the top Picatinny as well and may be offset to one side?

The BKL is the only sure fire way IMHO.

Otherwise a BSA 13mm dovetail mount would work.