a reply to:
asabuvsobelow
Just so you know, the m4a1 is basically fully fielded at this point and it's S 1 A...
Thankfully they've finally ditched the horrific m16a2 3 setting 4 different trigger pull abortion of an FCG and our guys once again use their trigger
finger for burst control as God and Hiram maxim intended!
(Not to mention that if you are gonna have a burst setting its been scientifically proven that you're much better off with a 5-7 round burst at
typical assault rifle cyclic rates because at 3 rounds the last 2 rounds of your burst are all but guaranteed to represent the furthest a user will be
off target consistently!
On that note the cyclic rates of the m16 and almost every other current military GI rifle out there right now are in a well known for decades
kinematic ergonomic and human factors "dead zone" that exists between 10 and 20 hertz i (rounds per second and or 600-1200 rounds per minute).
You are far better off because of human reaction time and multiple other factors having a cyclic rate under 600 or over 1200 rpm than anywhere in this
range. This is part of the secret of James Sullivan's "constant recoil" concept he used in his ultimax machine gun design (as well as his AR/m16 deep
update kits of various stripes and his new MG X design) that makes it so much better to fire accurately etc which is not publicly mentioned basically
ever.
As to the suppressor and suppressed GI gun thing...
There are multiple ways to skin that cat, a piston system being one of them though honestly even SOCOM isn't actually going to put enough rounds
through their guns between chances to at least do a perfunctory good enough cleaning of their gun's insides unless something has gone horrifically
wrong and yet somehow they've managed to get ammo resupply on the fly!
In addition to that, your can is gonna absolutely need cleaning before your gun insides are if you are practicing the CLP douche and occasional
boresnake preventive maintenance plan by a massive enough margin that you'd be all but guaranteed to start seeing baffle strikes and suppressor
shooting off guns before guns started going down!
Now, go to a short enough barrel length (quite a bit shorter than even a mk18 barrel, ridiculously you shouldn't be using 5.56 for this application
short in truth!) And piston becomes the way to go though even if it's in those other calibers.
But even in the whole always on suppressor scenario provided you aren't running ridiculously short barrels there's a whole host of things you can do
to make the DI AR at least as good and often outright better wrt suppressor operations and cleaning that the DOD just does not do because they suck
and they hate their employees!
Sadly, making people obsessively detail clean their guns and on a far too frequent basis becomes an even bigger liability once you throw suppressor
into the mix.
Also on the flipside of this the hk416/m27 is known for being gassy as hell and getting crudded up to the point of inducing stoppages incredibly
quickly because it's a very poor implementation of a piston operating system so pistons aren't even a sure thing advantage wrt suppressors!
It gets worse for piston guns and suppressor use too because the actual expansion chamber and piston itself can and will crud up enough to cause
stoppages in many cases at lower round counts than a DI AR will experience them due to receiver fouling. (and good luck fouling a gas tube) And trust
me when I tell you you'd much rather pop a pivot pin and panic field expedient clean the inside of an AR upper/bcg at night in the dark under fire
than disassembling cleaning and reassembling something like a 416 gas system AND popping the pivot pin and panic scrubbing the upper and bcg in the
same conditions! (No dwell time remember? That means with a suppressor installed you're gonna foul the piss out of both your gas systems and
receivers!)
Luckily for both piston and AR style DI guns though there's actually a whole suite of things that can be done to mitigate the increased fouling and
gassing issues that suppressors can cause (the propellant gas and debris is also really not good to inhale etc) most of which apply equally to piston
and DI military firearms.
And that, my friend, is really the issue here...
There's really no such thing as the "better" operating principle/system!
It is all purely a series of tradeoffs and engineering decisions made during the design and construction of each individual implementation of each
operating system which determines whether THAT INDIVIDUAL DESIGN will be better or worse than any other individual design.
Truthfully it's an all around poor way to attempt to separate firearms designs into different categories period because the definition and usage of
each label is poorly defined, inconsistently applied to different designs, and altogether too inconsistent to even be truly meaningful
distinctions!
Guns like the hac-7 and AR15 are both prime examples of this truth be told. In the hac-7 you have a gas tube that runs to a "long stroke piston". In
the AR you have exactly the same thing!
And yet their operating systems are quite different.
(Yes I know you take exception with the idea that the AR is piston operated but it really is and you could make a very good case for calling it a long
stroke piston since the piston/bolt aren't returned to a "top dead center" ready to cycle again state until the camming surfaces engage on the return
stroke of the bolt carrier.)
Conversely, we have the m1 carbine which is considered a short stroke piston even though it's piston is only mechanically returned to it's top dead
center ready to fire position when the forward slide surface of the bolt carrier which extends under and past the front of the chamber pushes it back
closed on return stroke.
Do you kinda see what I mean by the definitions and usage of the terms short & long stroke as well as DI are kinda useless to even separate guns into
different categories now?
(Bonus weirdness, "TRUE" direct impingement gas systems literally squirt gas at a flat spot or indentation in the front of the bolt carrier as seen in
the ag42 ljungman and mas 49 service rifles... Confusing right?!)
The definition and implementation situation is a part of what makes this conversation so frustrating and ultimately fruitless... We're arguing about
something where the distinctions between item A and item B are functionally meaningless and thus neither of us can ever be "right".