Below you will find pages that utilize the taxonomy term “MHS”
SIG M17 vs M18 2026: Which to Buy — and Which You Can Own
SIG M17 vs M18: Which One Should You Buy? (The Three-Second Answer)
Short answer: If you are going to carry it, buy the M18 — 3.9" barrel, 7.2" overall. If you want the longer sight radius for range work and competition, buy the M17 — 4.7" barrel, 8.0" overall. That is the whole decision, because mechanically only three parts separate the two pistols: the slide, the barrel, and the recoil spring assembly. Everything else is the same gun — same Fire Control Unit (FCU), same grip height and width, and the 17-round standard magazines are fully interchangeable, as are the 21-round extended magazines.
FN 509 Complete Guide: Military-Grade Pistol & Training Guide
FN 509 Introduction
The FN 509 is a polymer-frame striker-fired pistol manufactured by FN America, the U.S. subsidiary of legendary Belgian firearms manufacturer FN Herstal. Released in 2017, this pistol originated from FN’s submission to the U.S. Army’s XM17 Modular Handgun System (MHS) competition. Although it lost to the SIG P320, the FN 509 underwent rigorous testing with over one million rounds of ammunition, proving itself as a reliable, accurate, and feature-rich tactical pistol.