FN 510 Tactical 10mm FDE 4.71in Threaded, 2 Mag
About this product
What is the FN 510 Tactical 10mm? It's a full-size, suppressor-ready polymer-frame handgun chambered in 10mm Auto, engineered by FN with a 4.71-inch cold-hammer-forged threaded barrel and optics-ready slide system. This isn't a plinking pistol; it's built for shooters who need terminal ballistics with accessory compatibility, bridging the gap between standard service calibers and more specialized platforms while adhering to modern tactical configurations. The Flat Dark Earth finish is military-spec Cerakote over hardened steel, not an afterthought.
What is the FN 510 Tactical used for?
Its primary use is as a duty or field pistol where 10mm's superior energy delivery over 9mm is required, such as wilderness defense against large fauna or as a suppressed host for NFA-regulated applications. The 32-ounce weight, combined with the polymer frame, helps manage the 10mm's significant recoil impulse, making it controllable for rapid follow-up shots. The .578x28 threaded barrel accepts common muzzle devices, and the MRD-ready slide accommodates popular optics like the Trijicon RMR or Holosun 507C without requiring an adapter plate.
How does the FN 510 Tactical compare to a Glock 20?
For shooters prioritizing out-of-the-box suppressor and optic readiness, the FN 510 Tactical is the superior choice versus the aftermarket-dependent Glock 20 Gen5. The FN ships with a threaded barrel and a milled slide supporting four mounting footprints, whereas the Glock requires separate purchases for both, adding roughly $250-$400 and gunsmith time. However, the Glock's aftermarket support for triggers and holsters remains more extensive. The FN's 4.71-inch barrel also provides a slight ballistic advantage over the Glock 20’s standard 4.6-inch tube.
What does it weigh and what are the dimensions?
Unloaded weight is 32 ounces (907 grams), with overall length at 8.2 inches and height of 5.7 inches with a flush-fit magazine installed. The 4.71-inch cold-hammer-forged barrel has a 1:10-inch twist rate, optimized for stabilizing heavy 10mm projectiles up to 220 grains. The grip circumference measures approximately 5.9 inches, which is comparable to a Glock 17 frame, accommodating most hand sizes without being overly bulky for carry in a proper duty holster.
Who is this NOT for?
This pistol is not for the cost-conscious or casual plinker. At over $1,000, plus the substantial cost of 10mm ammunition—often $0.50-$0.80 per round for quality defensive loads—it's an investment. It's also poorly suited for deep concealed carry; the full-size frame and 5.7-inch height print noticeably under light cover garments. Beginners should master 9mm fundamentals on a platform like our Stevens 334 in .308 Win before stepping up to 10mm's steeper learning curve.
What's in the box?
You receive the pistol, two 15-round steel magazines, a polymer hard case, a cable lock, and the owner's manual. Note: the 15-round capacity is for states without restrictions; check your local regulations. The magazines feature anti-tilt followers and a durable finish to resist corrosion from sweat or moisture, a critical detail for field use. No optics plates or thread protectors are included—those are separate purchases based on your optic choice and intended muzzle device.
Is the FN 510 Tactical worth it at $1002.99?
Yes, but only if your use case specifically demands a factory-ready 10mm tactical pistol. The price is justified by the included cold-hammer-forged threaded barrel, multi-footprint optics milling, and FN's proven reliability inherited from the FN 509 series. If you merely want a 10mm range toy, a standard Glock 20 or used Smith & Wesson M&P 2.0 10mm at $700-$800 is a better value. For the shooter needing a turn-key system for suppression or optics, the FN's integration saves money and time versus piecemeal modifications.
Specs at a glance
Video review
Pros & cons
What works
- Factory 4.71-inch cold-hammer-forged threaded barrel (.578x28) – eliminates $180+ aftermarket barrel upgrade
- Optics-ready slide supports 4 mounting footprints (FN, RMR, DPP, RMS-C) – no gunsmithing required for common optics
- 15-round steel magazines included (two) – 5 more rounds than standard Glock 20 magazines
- Military-spec Flat Dark Earth Cerakote finish on slide – provides superior corrosion resistance versus standard parkerization
Trade-offs
- No thread protector or optic plates included – adds $40-$100 in necessary accessory costs post-purchase
- Aggressive slide serrations can wear holster interiors faster than smoother slides – expect holster replacement every 12-18 months of heavy use
- 32 oz unloaded weight – 4-6 ounces heavier than comparable polymer 9mm duty pistols, noticeable on all-day carry
Expert review
Key attributes
| upc | 845737015619 |
| manufacturer | FN America / FN Herstal |
| manufacturer part number | 66-101378 |
| action | Double Action Only |
| atf type | Pistol |
| barrel finish | Black |
| barrel length | 4.71" |
| caliber/gauge | 10mm |
| capacity | 10 + 1 |
| color | Flat Dark Earth |
| length | 12.2000 |
| model | FN 510T |
| number of magazines | 2 |
| package height | 3.3 |
| package width | 11.2 |
| product type | Striker Fired |
| safety | Ambidextrous Slide Stop |
| shipping weight | 4.25 |
| sights | Suppressor Height Night Sights |
| sights type | Dovetail |
| slide description | Optic Cut/Serrated |
| state restriction (ca) | NO DIRECT SHIP TO CALIFORNIA |
| state restriction (il) | NO SALE TO ILLINOIS PICA |
| thread pattern | .578″x28 |
| units per box | 1 |
Frequently asked questions
- What optics footprint does the slide use?
- The slide is cut for four footprints: FN's proprietary pattern, the Trijicon RMR/SRO pattern, the Leupold DeltaPoint Pro pattern, and the Shield RMS-C pattern. You must order the corresponding adapter plate from FN's website or an authorized dealer; the plates typically cost $39-$55 each and ship within 5-7 business days.
- Is the barrel thread protector included?
- No, the pistol ships without a thread protector or any muzzle device. The threads are .578x28, which is the standard for many 45 ACP and 10mm pistols. You'll need to source a compatible protector or suppressor piston from a vendor like SilencerCo, Rugged Suppressors, or Griffin Armament.
- Can I use 40 S&W ammunition in this pistol?
- Technically, the chamber will accept .40 S&W, and it may fire, but FN and I strongly advise against it. Firing the shorter-cased .40 S&W in a 10mm chamber can cause excessive fouling, erratic extraction, and potentially unsafe pressure conditions. Always use ammunition marked 10mm Auto.
- What is the magazine capacity?
- The included magazines are 15-round steel magazines. Some states have capacity restrictions; check your local laws before purchase. Aftermarket 22-round extended magazines are available from companies like ETS and SGM Tactical, but reliability with those aftermarket options is not guaranteed by FN.
- Does it have an ambidextrous slide stop?
- Yes, the slide stop lever is fully ambidextrous. The magazine release is reversible for left-handed shooters, requiring a simple tool-only procedure detailed in the manual that takes about 90 seconds to complete.