After spending hours on the range with the Daniel Defense H9, I sent it back to the factory to see if those nagging issues could be ironed out. In my latest video, I cover the full return-and-test cycle: Did Daniel Defense manage to fix the failures-to-feed, the slide-lock problems, and the missing optic plate? Or is this pistol still a work in progress?

What Happened on Return
Once the H9 arrived at the Daniel Defense service center, they performed a full inspection, replaced the extractor and guide rods, and installed the proper optic adapter plate before sending it back. They also updated the recoil spring assembly to tighter tolerances and confirmed magazine catch tension was within spec.

Range Testing the “Fixed” H9
Back on the firing line, I ran the same drill as before—hundreds of rounds through a variety of factory 9mm loads and multiple magazines. Here’s what I found:

• Failures to Feed: Gone. No stovepipes, no double-feeds, and no second-guessing whether each round would chamber cleanly.
• Slide-Lock on Empty: Rock solid. Every empty reload locked the slide back as intended, with zero hesitation.
• Optic Mounting: Seamless. The factory-installed adapter plate dropped right into SIG-style footprints, and my Cyelee Wolf EDG enclosed emitter sat perfectly flush. No more back-orders or extra expenses.

Verdict
Daniel Defense delivered on their promise. The returned H9 now runs flawlessly—proof that the underlying design was sound, and that the early issues were service-correctable rather than inherent. Ergonomics, trigger feel, and that eye-catching retro-futuristic styling remain as good as ever.

If you missed the live demo, check out the video review for every detail, including slow-motion cycling, magazine ejection, and optic co-witness tests.

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Interested in seeing how the “fixed” H9 compares to another all-metal, striker-fired contender like the Fusion Firearms XF Pro? Drop a comment below and I’ll line up the next head-to-head.

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