yes but you will need a RMSc adapter plate like this one amazon.com/Beretta-APX-Footprint-Optic-Plate/dp/B0F6VY8GC2/ref=sr_1_10?adgrpid=1339207670139704&dib=eyJ2IjoiMSJ9.BhyiOUM4l5jT8qpY5fjVscmgNabqekwkxzOKKotXF1DmTgmoxFcYXp5Du6zmfTCVhN4R5LaUrosMmy_BCGDl4VQi-rxnA3YiCQUkyE2mbsCzB9zdOary_ktzDNeYXWoOL88RARJI_-C-tNcx5_4VNppM_FdPK4kvvfaSSbm5TGKNrBVo5XZ_oAb09tIXvPL6V5P_2AZoSQG8q0L2SHuE7taqpo7knrj1cl2fLVY9iak.ZIGnqZl8zVbpul4jre9feQeLFwsP0EeJUPgIq45Bsis&dib_tag=se&hvadid=83700754609195&hvbmt=bp&hvdev=c&hvlocphy=84418&hvnetw=o&hvqmt=p&hvtargid=kwd-83701629569537%3Aloc-190&hydadcr=9659_13530870&keywords=apx+a1+accessories&mcid=a2e692c47e3a378a936981a2633b4ac1&msclkid=fab105ff930d151c41546cc8f098e6b7&qid=1765237658&sr=8-10

The Olight Osight SE uses the Shield RMSc footprint, and while not directly listed for the Beretta APX A1 Compact (which often uses Holosun K/EPS footprints), it might work with an adapter plate, but expect overhang or require a specific plate, as the APX A1 typically favors smaller footprints like the Shield, 407K, or 507K; it's best to confirm with Olight or look for user experiences for a perfect fit, as direct mounting might not be ideal.
Key Considerations:
Footprint: The Osight SE is an RMSc footprint optic.
APX A1 Compact: This pistol usually takes optics designed for the Shield RMSc or Holosun K/EPS footprint.
Potential Fit: You might need an adapter plate (like an RMSc to K adapter) or it might overhang slightly, as seen with other optics on similar slides.
Recommendation:
Check the Olight website or forums for user reports on the Beretta APX A1 Compact to see if anyone has successfully mounted it or what adapter plate they used for a flush fit. Hope this helps. Have a good rest of your day.
🇺🇸🇺🇸 'Merica' 🇺🇸🇺🇸

With a RMSc adapter plate it will.