I started watching a detailed teardown and analysis of the SA-35 by BHSpringSolutions on YouTube. The guy seems to have deep knowledge of the BHP, but is pretty rambly. I'll try to summarize some of the differences he found between the SA-35 and the BHP.
* SA-35 safety is very easy to activate. Only slight pressure will activate it, and it can partially activate even when the hammer is down, which would cause a stoppage.
* Slide fit allows more lateral movement in the barrel than an FN when disassembled. Not a problem during firing.
* No mechanical firing pin block/drop safety
* Light firing pin spring -- coupled with no firing pin block, not good for drop safety.
* Sear lever pin started to deform during their testing.
* Progressive recoil spring. Longer than standard, which causes it to want to jump out during reassembly. Does make the slide easier to rack.
* Sights appear identical to the Tisas. One guy posted in the comments that HK VP9/P30 sights work.
* Small parts, such as the extractor, are better made in the SA-35 than the Tisas.
* Hardness testing shows the SA-35 frame and slide conform to FN hardness, but other parts are consistently softer than an FN/Browning.
* SA-35 safety is very easy to activate. Only slight pressure will activate it, and it can partially activate even when the hammer is down, which would cause a stoppage.
* Slide fit allows more lateral movement in the barrel than an FN when disassembled. Not a problem during firing.
* No mechanical firing pin block/drop safety
* Light firing pin spring -- coupled with no firing pin block, not good for drop safety.
* Sear lever pin started to deform during their testing.
* Progressive recoil spring. Longer than standard, which causes it to want to jump out during reassembly. Does make the slide easier to rack.
* Sights appear identical to the Tisas. One guy posted in the comments that HK VP9/P30 sights work.
* Small parts, such as the extractor, are better made in the SA-35 than the Tisas.
* Hardness testing shows the SA-35 frame and slide conform to FN hardness, but other parts are consistently softer than an FN/Browning.
