I believe this is correct. The Beretta M9 barrel is 125 mm; thus the odd 4.9 inch barrel length.
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Two threads on this.
https://pistol-forum.com/showthread....your-questions!
https://pistol-forum.com/showthread....e-CZ-P10/page3
Speaking of which - @benmac, any news on further reviews/T&E beyond Humble Marksman, and when it might be available?
Yes! We didn't send it to the humble marksman for testing, so much as we did sponsorship. We plan on having them shipped out within the next two months. We will also be announcing some new SCD / Holstering Safeties for other pistols soon plus some other news!