Ares Armor has developed a tunable compensator for 5.56mm weapons with 1/2-28 muzzle threads, which they are calling the “EFFIN-A.”
Jesse of Predator Intel describes the device:
This is the first Compensator that can be both stacked and tuned to
custom fit each rifle and the its gas dispersal. The EFFIN-A features
4 rows and 7 columns and 4 rows of ports that can be either opened or
closed off with of set screws. Threading is cut short eliminate the
possibility of a screw entering the chamber. This also bottoms out the
screw making sure you have a tight fit and withstand the pressure of
the gas forcing it out. You can also stack the Compensator allowing
for other options.
This Compensator combats muzzle climb in two ways; The EFFIN-A
Compensator’s timed and tunable exit ports act as an outside force
that returns the weapon to a “position of rest” by directly countering
the force of the round being fired in relation to the standard
shooter’s contact points on the weapon. This Compensator is also
designed to directly increase the weapons moment of inertia by
accurately counter balancing the mass of the front of the weapon in
relation to the force of motion created by the original force.
Due to the amount of time and money we spent on researching the amount
of pressure released during the act of firing a round and adjusting
the Compensator’s balance to correspond to it we will not be releasing
the exact weight until after the pre-order is finished and products
have already shipped. Note: testing was conducting with two types of
ammunition, Matchgrade and GreenTips. The general weight is between 4
and 5 ounces.
The Compensator has an outer diameter of 1″ and is 1.95″ inches in
length when the cap is removed. You have the choice of selecting the
EFFIN-A Compensator in Black or Stainless Steel depending on which
aesthetic appeals to you or best matches your weapon.
WARNING If you attempt to modify or use these devices in any way
attempting to create baffles for a suppressor, it will instantly void
our warranty and possibly land you in jail. PLEASE OBEY THE LAW!
We do not recommend stacking more than two of these on top of each
other. If you do so, you do it at your own risk and it will also void
A promo video showing various people using AR-15s equipped with the device has been released; this is the “clean” version, which has loud music playing in order to block out profanity.
Although threads are not shown in the 3D rendering below, the cap is screwed on with the same 1/2-28 threads. It is thus possible to attach another EFFIN-A Comp to the front of the device. This exploded view shows how the device is “tunable.”
Tunable compensators have been made before, but I do not believe that I have ever seen a compensator threaded to accept another compensator (or other muzzle device).
The “EFFIN-A” is available for pre-order at PredatorArmament.com, with a projected availability date of September 1st. It is available in black and stainless. The pre-order price is $90.99.