American Rifleman - July 2017 - 56

FN 509
Handgun System (MHS). Any time the military offers a
requirement for submissions, while there is ultimately
only one recipient (in the XM17's case, SIG Sauer's P320),
the entire gun community wins. This is because, as a
result, the civilian market is inevitably hit with many
of the unselected entrants, most of which are eminently
worthy designs; they simply weren't the right fit for that
particular requirement. FN's new pistol, the Model 509, is
one such gun.
FN didn't have an off-the-shelf solution to the MHS's
design criteria, however, so the company's engineers set
themselves to the task of creating a new gun, using the
existing architecture of the FNS Compact as a starting
point. FN's FNS series was added to the product lineup in
2011, and as an evolution of that line, the 509 retains
many of the primary design features of its progenitor. As
such, it is a polymer-frame, striker-fired, recoil-operated
semi-automatic pistol chambered in 9 mm Luger that
feeds from a double-stack, detachable-box magazine.
Aesthetically speaking, the 509 strongly resembles its
ancestor, looking more than anything like a slightly
beefed-up full-size FNS-9. Despite the resemblance,
several external modifications to the design are evident,
and a number of internal components have undergone a
complete re-design in order to ensure maximum reliability
and durability.
Standing 5.5" tall and 7.34" long with a 4" barrel, and
weighing 25.3 ozs. with an empty magazine, the 509 is
a tilting-barrel, locked-breech autoloader with barrelhood-to-ejection-port lockup. A captive, dual-nested
recoil spring assembly returns the slide to battery once
the pistol is fired, this configuration being used because
it reduces stress on the springs and increases the service life of these parts. The
gun's steel magazines have a
standard capacity of 17 rounds,
although 10-rounders will be
available for those jurisdictions
that require them.
The 509 uses a partially
pre-cocked, double-action-only
striker system, whereby pulling
the trigger first completes the
process of cocking the striker
before disengaging the striker
block and releasing the striker
to impact the cartridge's primer.
Designed as a duty pistol with
military and law enforcement
customers in mind, FN calibrated the 509's trigger
to break between 5 lbs., 8 ozs., and 7 lbs., 8 ozs., of
pressure-light enough to be easily manageable, but
heavy enough to discourage accidental discharges during
high-stress situations.
While the 509 does not feature a manual safety, it does
make use of four passive safety systems-a striker block,
a drop safety, a trigger disconnect and a trigger safety

56

JULY 2017

lever-which prevent the pistol from firing unless the
trigger is deliberately pulled and the slide assembly is in
battery. Many striker-fired pistols on the market today utilize Glock-style, "blade-in-trigger" trigger safeties, but FN
instead chose an articulated trigger safety when developing the FNS line, and this configuration is retained in the
509. According to the company, there is no downside to
this type of trigger, while its research revealed that some
shooters experience discomfort when using the blade-style
trigger safety.
FN is a company that takes ambidexterity very
seriously, in both its handgun and longarm lines, and
that design philosophy is clearly on display in the 509.
Identical, bilateral magazine releases and slide locks
are found on each side of the gun, and the company's
reasoning behind this is three-fold. One, this configuration doesn't exclude any shooters from using
its products; this may sound simplistic, but there are
many handgun designs on the market today that do.
Two, it allows a single home-defense handgun like the
509 to be utilized by every member of that household,
regardless of their respective hand and eye dominances. And lastly, injury or situational tactics may
require that a handgun be run one-handedly, and bilateral controls allow this to occur regardless of whether
the primary or support hand is being used.
It is on the 509's fiberglass-reinforced polymer frame
where the most obvious changes to the FNS can be
observed; the latter's relatively blocky shape giving way
to a much more ergonomic form. This is most notable
high up on the frame, where the grip narrows
slightly to create a slimmer approach to the
trigger guard. This area, between the slide
Designed using the
framework of the
FNS Compact, the
new 509 retains its
predecessor's lockedbreech operating
system and doubleaction-only trigger.

AMERICAN RIFLEMAN



Table of Contents for the Digital Edition of American Rifleman - July 2017

Contents
American Rifleman - July 2017 - Cover1
American Rifleman - July 2017 - Cover2
American Rifleman - July 2017 - 1
American Rifleman - July 2017 - Contents
American Rifleman - July 2017 - 3
American Rifleman - July 2017 - 4
American Rifleman - July 2017 - 5
American Rifleman - July 2017 - 6
American Rifleman - July 2017 - 7
American Rifleman - July 2017 - 8
American Rifleman - July 2017 - 9
American Rifleman - July 2017 - 10
American Rifleman - July 2017 - 11
American Rifleman - July 2017 - 12
American Rifleman - July 2017 - 13
American Rifleman - July 2017 - 14
American Rifleman - July 2017 - 15
American Rifleman - July 2017 - 16
American Rifleman - July 2017 - 17
American Rifleman - July 2017 - 18
American Rifleman - July 2017 - 19
American Rifleman - July 2017 - 20
American Rifleman - July 2017 - 21
American Rifleman - July 2017 - 22
American Rifleman - July 2017 - 23
American Rifleman - July 2017 - 24
American Rifleman - July 2017 - 25
American Rifleman - July 2017 - 26
American Rifleman - July 2017 - 27
American Rifleman - July 2017 - 28
American Rifleman - July 2017 - 29
American Rifleman - July 2017 - 30
American Rifleman - July 2017 - 31
American Rifleman - July 2017 - 32
American Rifleman - July 2017 - 33
American Rifleman - July 2017 - 34
American Rifleman - July 2017 - 35
American Rifleman - July 2017 - 36
American Rifleman - July 2017 - 37
American Rifleman - July 2017 - 38
American Rifleman - July 2017 - 39
American Rifleman - July 2017 - 40
American Rifleman - July 2017 - 41
American Rifleman - July 2017 - 42
American Rifleman - July 2017 - 43
American Rifleman - July 2017 - 44
American Rifleman - July 2017 - 45
American Rifleman - July 2017 - 46
American Rifleman - July 2017 - 47
American Rifleman - July 2017 - 48
American Rifleman - July 2017 - QAL1
American Rifleman - July 2017 - QAL2
American Rifleman - July 2017 - QAL3
American Rifleman - July 2017 - QAL4
American Rifleman - July 2017 - QAL5
American Rifleman - July 2017 - QAL6
American Rifleman - July 2017 - QAL7
American Rifleman - July 2017 - QAL8
American Rifleman - July 2017 - QAL9
American Rifleman - July 2017 - QAL10
American Rifleman - July 2017 - 49
American Rifleman - July 2017 - 50
American Rifleman - July 2017 - 51
American Rifleman - July 2017 - 52
American Rifleman - July 2017 - 53
American Rifleman - July 2017 - 54
American Rifleman - July 2017 - 55
American Rifleman - July 2017 - 56
American Rifleman - July 2017 - 57
American Rifleman - July 2017 - 58
American Rifleman - July 2017 - 59
American Rifleman - July 2017 - 60
American Rifleman - July 2017 - 61
American Rifleman - July 2017 - 62
American Rifleman - July 2017 - 63
American Rifleman - July 2017 - 64
American Rifleman - July 2017 - 65
American Rifleman - July 2017 - 66
American Rifleman - July 2017 - 67
American Rifleman - July 2017 - 68
American Rifleman - July 2017 - 69
American Rifleman - July 2017 - 70
American Rifleman - July 2017 - 71
American Rifleman - July 2017 - 72
American Rifleman - July 2017 - 73
American Rifleman - July 2017 - 74
American Rifleman - July 2017 - 75
American Rifleman - July 2017 - 76
American Rifleman - July 2017 - 77
American Rifleman - July 2017 - 78
American Rifleman - July 2017 - 79
American Rifleman - July 2017 - 80
American Rifleman - July 2017 - 81
American Rifleman - July 2017 - 82
American Rifleman - July 2017 - 83
American Rifleman - July 2017 - 84
American Rifleman - July 2017 - 85
American Rifleman - July 2017 - C1
American Rifleman - July 2017 - C2
American Rifleman - July 2017 - E1
American Rifleman - July 2017 - E2
American Rifleman - July 2017 - MW1
American Rifleman - July 2017 - MW2
American Rifleman - July 2017 - S1
American Rifleman - July 2017 - S2
American Rifleman - July 2017 - SW1
American Rifleman - July 2017 - SW2
American Rifleman - July 2017 - W1
American Rifleman - July 2017 - W2
American Rifleman - July 2017 - 88
American Rifleman - July 2017 - 89
American Rifleman - July 2017 - 90
American Rifleman - July 2017 - 91
American Rifleman - July 2017 - 92
American Rifleman - July 2017 - 93
American Rifleman - July 2017 - 94
American Rifleman - July 2017 - 95
American Rifleman - July 2017 - 96
American Rifleman - July 2017 - Cover4
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