EFK Fire Dragon
EFK Fire Dragon FN Five-seveN Threaded Barrel
5.5-inch 416R threaded barrel for the FN Five-seveN, with an M10x1-to-1/2x28 adapter.
Quick Specs
- Price
- $398
- Weight
- N/A
- Brand
- EFK Fire Dragon
- Category
- pistol-barrel
Features
- •5.5 inch barrel
- •M10x1.0 RH muzzle threads
- •M10x1.0-to-1/2x28 adapter included
- •416R stainless steel, heat treated to 40-42 Rc
- •1:9 RH button rifling
- •Fits USG, IOM, Mk II, Mk 3, and MRD models
Capability Boosts
Recommended For
+2 more
Compatibility Tags
Overview
The EFK Fire Dragon threaded barrel gives the FN Five-seveN a 5.5-inch barrel with an M10x1.0 right-hand muzzle thread. It drops into the USG, IOM, Mk II, Mk 3, and MRD versions of the pistol.
The raw barrel thread is M10x1.0 RH. EFK includes an adapter that changes that interface to 1/2x28 for a compatible muzzle device. The adapter does not change the thread cut into the barrel, so direct-thread devices must match the interface that is actually exposed.
EFK machines the barrel from 416R stainless steel, heat treats it to 40-42 Rc, and uses conventional 1:9 right-hand button rifling. The maker directs owners to complete a 150-round break-in before attaching a muzzle device and to use new factory ammunition.
Key Features
- 5.5-inch drop-in barrel for listed FN Five-seveN generations
- Native M10x1.0 RH muzzle thread
- M10x1.0-to-1/2x28 adapter included
- 416R stainless steel construction
- Heat treated to 40-42 Rc
- Conventional 1:9 RH button rifling
Pros
- +Fits USG, IOM, Mk II, Mk 3, and MRD pistols
- +Included adapter exposes the common 1/2x28 device-side interface
- +416R stainless construction with published heat-treatment hardness
- +Drop-in design avoids custom barrel fitting
Cons
- −EFK calls for a 150-round break-in before attaching a muzzle device
- −The maker directs owners to use new factory ammunition
- −The adapter adds another threaded connection to check during setup
- −Devices mounted without the adapter must match the native M10x1.0 RH thread
Detailed Specifications
- Caliber
- 5.7x28mm
- Barrel Length
- 5.5 inches
- Native Thread
- M10x1.0 RH
- Included Adapter
- M10x1.0 to 1/2x28
- Material
- 416R stainless steel
- Rifling
- 1:9 RH conventional button rifling
- Hardness
- 40-42 Rc
- Fitment
- FN Five-seveN USG, IOM, Mk II, Mk 3, and MRD
- Required Break-In
- 150 rounds before attaching a muzzle device
Compatible Platforms
Pairs Well With
Top matches
Sig Sauer
Sig MCX Virtus Patrol 16"
1 shared compatibility tags
Sig Sauer
Sig MCX Spear-LT 11.5"
1 shared compatibility tags
Sig Sauer
Sig Sauer SIG516 G3 Mohawk 16" 5.56
1 shared compatibility tags
CZ
CZ Bren 2 Ms 16.5" Rifle
1 shared compatibility tags
Primary Weapons Systems
PWS MK111 MOD 2-M Rifle .223 Wylde (SBR)
1 shared compatibility tags
Daniel Defense
Daniel Defense DDM4 V7
1 shared compatibility tags
Similar Products
Related Guides & Articles
Guides
Build Your Custom Configuration
Add the EFK Fire Dragon FN Five-seveN Threaded Barrel to your build and see how it enhances your platform.