Armorer’s Wrench for AR-15 & Multi-Fuction Tool by AT3™
Birchwood Casey Shoot-N-C Target - Round Bullseye - 12" - 5 Targets
3 Prong Flash Hider and Compensator for .300 Blackout and .308
A .30 cal Flash Hider built specifically for a combat rifle, with minimal dust signature and no ringing noise typical of 3-Prong designs. Optimized for flash reduction, with tapered ports to efficiently compensate for recoil, the FOSSA-762™ provides the best performance from a flash hider in its class. A big brother to the FOSSA-556, this device works perfectly with .308 WIN/7.62×51 NATO for your AR-10, or with .300 Blackout with the AR-15.
The FOSSA-762™ is not compatible with suppressors.
Features:
- The Most Effective Flash Reduction
- Mitigated Dust Signature
- Compensated Muzzle Rise
- Reduced Rearward Recoil
- No Increase in Concussion or Noise
- No Annoying Ringing Sound
Specifications:
- 17-4PH Stainless Steel
- Black Oxide Finish
- 5/8×24 TPI Threads
- For .30 Caliber (.300 Blackout, .308 WIN)
FAQ from White Sound Defense:
Q: How should the FOSSA-762™ be oriented (‘clocked’) in relation to the barrel?
A: The widest prong should be at the 6 O’clock position. This means that the vent between the two narrow prongs will be straight up at the 12 O’clock position.
Q: How does the FOSSA-762™ mitigate recoil without a traditional baffle?
A: There are several features that contribute to recoil mitigation. The vents on the device decrease in width by about 25% over their length. This narrowing acts as a choke forcing the propellant gases to vent to the sides rather than continuing forward. The central bore geometry and angle of the vent walls are also structured to assist in pushing gases to the side. The recoil reduction is approximately half of what you get from a competition style brake, but without the noise or concussion. Remaining muzzle rise is corrected by the asymmetric vents. The result of these two features is a significant and measureable reduction in split and transition times.
Q: How will the FOSSA-762™ affect accuracy?
A: This is one of those tricky areas that the marketing folks love to play games with. It is important to understand that muzzle devices can affect accuracy in several ways:
First, they have the potential to create propellant gas flows that disrupt the projectile. Propellant gas flows are very complex systems and it is not always obvious what will and will not affect accuracy. The FOSSA-762™ has been carefully designed and tested to ensure that it does not generate disruptive flows that negatively affect accuracy. It may be of note that most open prong designs do not have gas flow accuracy issues.
The next way a muzzle device can influence accuracy is by changing barrel harmonics by changing the mass near the muzzle. Muzzle devices vary in weight and overall profile. As such, changing muzzle devices will nearly always change point of impact and have some effect on accuracy. A good example of this effect is the Browning BOSS system. It allows the tuning of mass placement to match particular cartridge loads. The same sort of tuning happens when you change muzzle devices. The effect will vary from gun to gun and from specific load to specific load. This is partly why some companies claim their muzzle device can improve accuracy. In some cases, you may improve a specific barrel and load combination by switching to a heavier or lighter muzzle device. In general, the affect is fairly moderate when compared to things like ammo quality and barrel wear.
The last area to talk about is the torque used to attach the muzzle device to the barrel. Excessive torque or a loose muzzle device can have a negative effect on accuracy. For a 7.62 / .30 cal barrel 15 – 40 ft/lbs of torque is recommeded. Those more concerned with accuracy are best served toward the lower side. Those worried about muzzle device separation may be better served toward the higher side. A high temperature thread locker will provide additional assurance.
Q: How much length will the FOSSA-762™ add to my barrel?
A: The FOSSA-762™ will add approximately 2.18” to the length of the barrel, but will vary slightly depending on crush washers, shims and your specific barrel.
Q: What thread locker is recommended?
A: If no suppressor will be mounted then a high temp medium strength thread locker such as Loctite 246 or other product rated for service at 450F or above works well. If a suppressor is to be mounted, the muzzle device will be subjected to higher temperatures and a specialty thread locker such as Rocksett or Resbond 907TS is appropriate. In all instances, clean and degrease the threads before installation.
Q: Is it better to use crush washers or shims/peel washers for orienting a muzzle device?
A: Crush washers are easier to install, but they should not be used when the muzzle device will function as a suppressor mount. In those cases use a shim or peel washer as required.
Q: Is the FOSSA-762™ intended for use with a sound suppressor?
A: Current production models (002) are not designed for specific suppressors. In the future, other versions may be made available to fit specific suppressors.
Q: Why do some brands of ammo create ‘sparks’ even when there is no muzzle flash?
A: The type of the power used in some ammo can result in unburned power and glowing bits of debris being blown out the muzzle. This is more common in shorter barreled weapons. All brands of ammo will have occasional ‘sparks’ from a particular round, but some brands (generally the cheaper ones) will throw large numbers of sparks with every round. If you run into this, the solution is to use a brand of ammo that burns more completely and cleanly within the length of barrel you are using. No muzzle device can conceal glowing sparks that actually exit the barrel.
Specifications:
| Title | Aluminum Titanium Nitride (AlTiN), Black Oxide |
Have Questions About this Product?
The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.
If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.
White Sound Defense Warranty
- White Sound Defense guarantees that its products are free from defects in materials and workmanship.
- In the event of any defects in materials or workmanship, White Sound Defense’s sole liability shall be the replacement of any product that is defective in material or workmanship.
- This warranty specifically excludes any and all consequential or accidental damages.
- No other warranties or liability whatsoever, are either expressed or implied.
- Because of the nature and use of the products we sell there is no warranty of fitness for a particular purpose. It is up to the purchaser to decide for themselves if the product is appropriate to their intended use.