You just argue for the f**k of it. The maker and you on another thread said it increased back pressure, you said you were the freakin designer.
What you forgot??
Actually I never said it increased backpressure and that was never a part of the development process. That is what people say about the KX3 and I really never spent any time thinking about whether it might or not. However I did spend some time thinking about it last night.
No muzzle device can increase the back pressure. It is simply not possible for gas to expand into a chamber and have the pressure increase. That would violate the basic laws of gas physics. At best a muzzle device like the SPEX or KX3 may increase the dwell time of the pressure pulse.
I say it "may" because to my knowledge there is no proof it actually does. The theory is that the gas expands into the inner chamber which then inhibits the flow out of the barrel. However from my extensive work with silencers I can tell you that there is a well known phenomenon that occurs inside silencers where blind chambers become pressurized and stop "working" which allows the following gas to simply flow down the centre bore. If that can occur in a 7" long multi-chamber silencer then it certainly can happen in a single chamber, 2" long muzzle device.
Neither the SPEX nor the KX3 have any internal structures that would inhibit flow out of the bore so I suspect their ability to increase the pressure pulse dwell is limited.
Your objection to the SPEX is that it increases the pressure pulse to the gas system. I have shown that the pressure does not increase, only that their may be a lengthening of the pressure pulse. If that is still bad, what happens when we use a longer barrel?
Consider a 16" barrel with a carbine length gas system. The bullet seals the bore for a further 5-6 inches of travel before uncorking. That creates a considerably longer dwell time on the pressure pulse to the gas system. The bullet tightly seals the bore where a device like the SPEX has a very large bore that allows a lot of blow by.
Thus a longer barrel offers much more pressure-time to the gas system than a SPEX or KX3 ever could.
Would anyone here like to offer any kind of argument that longer barrels cause damage to the rifle? Anyone? .......... Buehler? ............... I didn't think so.
From another discussion regarding buffer weight someone noted that the AR's gas system is self regulating and it only uses the gas it needs. Any excess is vented out the side of the bolt. So even if the SPEX did increase pressure (which it doesn't) and even if it increases dwell time (which it may or may not but who cares cause it is certainly no worse than using a longer barrel) the gas system will simply use what it needs and dump the rest out the side of the gun. This is also true for a piston system.
If you don't like this product then don't buy it. But please stop ####ting all over it for no reason. It won't hurt your rifle anymore than using a longer barrel and in all likelyhood is probably easier on the rifle than a longer barrel will be.
