The FN 509 is built on the proven architecture of the FNS Compact. Featuring a cold hammer-forged stainless steel barrel; combat-style sights; front and rear cocking serrations; MIL-STD 1913 accessory mounting rail; interchangeable backstraps; double action operation; fully ambidextrous slide stop lever and magazine release; fixed 3 dot luminescent sights and a polymer construction with replaceable steel frame/slide rails. Includes two interchangeable backstraps, two magazines, owners manual, locking device and soft pistol case.
| Stock | Polymer with Mil-STD 1913 Accessory Rail |
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| Finish | Matte Black |
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| Sights | FT: 1-Dot Luminescent RR: 2-Dot Luminescent |
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| Capacity | 10+1 |
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| Model Series | FN 509 |
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| Barrel Length | 4 |
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| Overall Length | 7.4 |
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Determined at checkout.
