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I looked at several sellers descriptions & none stated it had a Mil-Spec buffer.
The ZPAP92 is loaded with features that include a dimpled 1.5mm receiver bulged trunnion chrome lined cold hammer forged barrel hinged top cover krink-style rear sight dual aperture front sight and a bolt hold-open notch on the selector. This model comes with extra features including a booster muzzle device optics rail buffer tube adaptor SBA3 brace and quadrail handguards. - 7.62x39mm caliber - Semi-automatic action - 30+1 round capacity - 10 cold hammer forged chrome lined barrel - Stamped steel 1.5mm receiver with bulged trunnion - Corrosion resistant hard nickel molly steel bolt carrier - Hinged top cover - Bolt hold-open notch on the safety selector - Krinkov style rear post front sights - Synthetic grip - Wood hand guard - 19.3 overall length - Weight is 6.6 lbs. - Booster Muzzle Device - Optics Rail - Buffer Tube Adaptor - SBA3 Brace Installed - Quadrail Handguards w/Angled Foregrip

Hi and welcome. This is a "Mil-Spec" buffer tube, so a change is not needed. Cheers, stay safe and enjoy!

Per sb-tactical.com/product/sba3/# website: Fit: All platforms capable of accepting a mil-spec carbine extension. The SBA3 is compatible with any mil-spec carbine receiver extension. With that being said, it's milspec