posted on Nov, 24 2019 @ 02:32 PM
Six years military experience three deployments and thousands of rounds put through an M4 Carbine, I truly do not understand why our military i.e.
combat arms is still using that direct impingement piece of crap. Our main military rivals have been using piston driven rifles since the 1960’s,
the primary example being the AK-47. Also the 5.56x45 round used in the AR-15 variety rifles is a joke in and of its self, requiring that our
soldiers be trained to fire in controlled pairs so as to ensure enough damage is done the target because one round falls short a high percentage of
the time. Now 5.56x45 has its positives it’s a low recoil round coupled with high velocity making it very controllable and easy to shoot, also
it’s a small light weight round allowing for a high ammo capacity with the average combat arms load out. The kinetic energy of the round is
pathetic carrying almost no punch behind it while at the same time its high velocity gives the round a tendency to pass through the target causing
minimal damage hence the controlled pairs. Compared to the 7.62x39 the 5.56 is a varmint round, the 7.62 is designed to cause maximum damage to soft
tissue, it’s a heavy slow moving round making it very very effective at stopping human targets.
Its disgusting really when you think about our troops in Vietnam fighting with AR-15’s in jungle conditions that direct impingement gas system in
jungle conditions firing the light weight 5.56x45 through the jungle bush, in fire fights against the Vietcong’s piston driven AK-47 firing heavy
devastating rounds ripping trough the bush. They didn’t stand a chance its almost like they set them up for failure, the M-14’s our troops started
with were the way to go.
Keep your rifle clean and she will give you no trouble our team leaders said on my first deployment, bull#. In desert conditions it is near
impossible to keep your rifle clean to standards , especially in Afghanistan with its silt like sand covering most of the country this is not normal
sand I’m talking about this is something more akin to powdered sugar mixed with sand, god forbid it rains because this stuff mixed with water is
something beyond mud. The more you oil your rifle the more this silt binds to the internals causing failures. Iraq presents the same issues
with sand though its not quite as bad as Afghanistan, its flat land scape provides no cover from the winds or the sand storms coming with the
Lets talk about the difference between Direct impingement and Piston operated, Both operate off the same principle of gas moving the bolt. The gas
provided by the rounds fired in the rifle are funneled into the barrel part of the gas is diverted into a tube which leads back into the rifle moving
the bolt and exchanging the round, the rest of the gas escapes through the end of the barrel . Now a piston system uses a rod attached to the bolt ,
the gas pushes the rod which in turn pushes the bolt the excess gas escapes back out of the piston, it’s a clean system no actual gas , carbon or
powder is pushed into the bolt . A Direct impingement system on the other hand uses the gas itself pushed directly into the bolt to operate it, along
with the gas comes carbon , powder , metal’s and other trash all pushed into the bolt compounded more and more with every round you fire building up
in the bolt causing failures , now lets say you add oil to avoid jamming the bolt which will work at first, eventually it makes the situation much
worse as the carbon, powder and other garbage is mixing with the oil creating a non-recoverable failure which can and will get you killed in the heat
of a fire fight. The more rounds you put through an M-4 during a fire-fight the more likely she is to jam period no matter how well maintained the
rifle is, An AK-47 or any piston driven rifle for that matter does not suffer this , just ad a little oil and that piston will just keep on stroking
until you run out of ammo, 1 round or a 1,000 it makes no difference the gas and trash is not being pushed Into the bolt group in piston rifles.
Piston rifles are far more balanced, each stroke of the piston is equal using the same amount of gas each time, DI on the other hand is chaotic at
best blowing unmeasured amounts of gas round to round into the bolt group. This is why piston rifles are far more reliable and high performance with
suppressors, as the piston can be manipulated to expel more gas making rounds being fired uniformly balanced low velocity across the board, DI rifles
require low velocity rounds with suppressors and even then they shoot like complete garbage with suppressors fixed.
There are AR-15 type rifles on the market with piston systems, why in gods name are our troops not carrying these rifles. It would require very little
retraining of our combat arms troops to switch over to a piston driven M4 / M16. And of course one more thing we need to switch to the 6.8spc , it
is the most well balanced round on the market with out question.
Thank you for your time guys, I am new hear and I know I have not earned the respect of your time so I appreciate your time in advance.