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Hi Joseph, It's Double-action without Manual Safety ----FN Herstal USA FNS-40 Semi Automatic Pistol 66760 .40 Smith & Wesson 4" Cold Hammer Forged Stainless Steel Barrel 1:16" Twist Rate Double-action without Manual Safety Fixed 3-Dot Sights 14 Round Magazine Polished Chamber and Feed Ramp Fully Ambidextrous Magazine Release Fully Ambidextrous Slide Stop Lever Two Interchangeable Back-Straps Serrated Trigger Guard MIL-STD-1913 Accessory Mounting Rail Rugged Polymer Construction Frame External Extractor with Loaded Chamber Indicator Front/Rear Cocking Serrations Overall Length 7.25" Overall Height 5.5" Overall Width 1.35" Overall Weight 27.5oz Matte Black Finish

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Its a Double action striker fired without Manual Safety The FN Herstal FNS-40 *******Double action striker fired autoloader is a combat ready firearm chambered in the hard hitting .40 Smith & Wesson caliber. The main benefit of the FNS pistol is that is features a fully ambidextrous set of operating controls for ease of use with either hand from any shooting position. The slide and barrel are constructed from stainless steel which will provide you with years of reliable service. The polymer frame features interchangeable backstraps and the MIL-STD-1913 picatinny rail under the frame will accept a wide variety of tactical lights, lasers and similar accessories. Specifications and Features: FN Herstal USA FNS-40 Semi Automatic Pistol 66760 .40 Smith & Wesson 4" Cold Hammer Forged Stainless Steel Barrel 1:16" Twist Rate Double-action without Manual Safety Fixed 3-Dot Sights 14 Round Magazine Polished Chamber and Feed Ramp Fully Ambidextrous Magazine Release Fully Ambidextrous

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The FN Herstal FNS-40 is a Double Action Striker Fired Pistol. Most striker fired pistols cannot be de-cocked. https://www.personaldefensenetwork.com/article/advantages-of-striker-fired-pistols/