Global Ordnance now has new 35 and 40 degree locking blocks for the SP10A3/SP45A3 on their website. I assume that, like the 40 degree block for the 9mm, they increase the delay for suppressed and/or higher pressure loads. I’m guessing that the factory blocks included with the guns are 45 degrees, like the US blocks on the 9mm.

Oooooh, they're offering the 35 degree block for the SP9A3 now also!

https://globalordnance.com/gra...block-35-degree-9mm/

I just ordered one. After an extensive range trip where I went back and forth between the 40 and 45 degree blocks (and a lot of shop towels), the difference is noticeable enough to me that I definitely want the 35. The 40 is good, but if there's a factory option to run it even softer suppressed, I'm going to try it.

Dang! That wasn't there yesterday when I ordered the blocks for my SP45A3.

Honestly, the only reason I knew they had them was a Reddit post about them. The guys in the Stribog subreddit tend to be pretty on top of things, so it may have only been up for a few hours when I saw the listing. I figured I’d jump on one before they potentially sold out.

Received and installed it a few days ago, and tonight I got out o the desert with some friends and put some 147gr through my suppressed SP9A3. It was noticeably quieter. I did a half dozen rounds with no ears on and there was no bite whatsoever, even with my traditional style high back pressure can. With the 45 and 40 degree blocks, even a single round is painful. The gun also seems to recoil less. Worth it in my opinion. I’m very pleased.