chinese CQ rifle feed ramps V/S Colt M4 extended feed ramps

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zain

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i have been looking for the answer all around but could not find one , so really dont know if it is a beaten path , plus I am new to AR platform .


The question is

Chinese CQ rifle is said to have been based on Mil Specs , and colt M4 has extended feed ramps to ensure the smooth feed and flow of rounds in chamber . This quality is possessed by a gun made on Mil specs. Does the Chinese CQ /M4 rifles sold in Pakistan have the extended feed ramps or otherwise .

The input would be appreciated , please .
 
This is the feed ramp area of a CQ from the first batch of rifles sold in Canada. The feed ramps are cut into the barrel extension, but not the receiver. this works just fine, done the other way (ramps in the upper receiver, and not the extension) it doesn't work. No ramps at all also work for semi auto rifles. Service M16 rifles will be found with and without ramps, the ramps showing up on the M4 carbine to ease the feed path ON FULL AUTO from a carbine length gas system, which tends to cause more violent bolt action, due to higher operating pressure over a shorter 'cork' time.




Welcome to the world of the AR, careful it's addictive!
 
Thanks mate.
so, in this way, we could say that the claim of Cq 5. 56, Chinese clone of M4, to be based on Milspecs, is not true, though to the extent of extended feed ramps.
Well, would it cause any effect on reliability. ?
 
When i started in restricteds, i bought a chinese CQ, it was full reliable, finition was fair, the frustration of trying to make this rifle group good, just made me sell it... JP.
 
zain said:
Thanks mate.
so, in this way, we could say that the claim of Cq 5. 56, Chinese clone of M4, to be based on Milspecs, is not true, though to the extent of extended feed ramps.
Well, would it cause any effect on reliability. ?
Click to expand...

The whole concept of Milspec is somewhat misleading - for example Knights Armament rifles can also said to be not Milspec, as can Colt Canada's C8 and C8IUR - they don't conform strictly to the US Gov's M4 technical data package (TDP) for the rifle, they exceed it in many ways and they are an issued rifle to very select units, despite not being a true "milspec" gun. Additionally, we tend to look at the US military specification as the only one, since they originated the TDP in question - there are military units (including some very skilled Spec Ops units in China) using the CQ, as well as Chinese client states like Iran and Paraguay. There is absolutely no requirement for feed ramps in a semi automatic AR15 rifle, and some pretty knowledgeable people point out that the M16 and XM177 / CAR series military guns ran fine without them for 30 plus years, so really the necessity is questionable. The CQ runs fine as it is, it lacks some refinement in finish, but the vast majority will shoot into 2 inches with no problem and they are (on average) hugely reliable. Most folks have no reliability issues with the CQ. One last thing - any M4 type rifle that does not have the ability to fire fully automatic is by definition not Milspec, since the TDP specifies select fire capability.
 
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enefgee said:
The whole concept of Milspec is somewhat misleading - for example Knights Armament rifles can also said to be not Milspec, as can Colt Canada's C8 and C8IUR - they don't conform strictly to the US Gov's M4 technical data package (TDP) for the rifle, they exceed it in many ways and they are an issued rifle to very select units, despite not being a true "milspec" gun. Additionally, we tend to look at the US military specification as the only one, since they originated the TDP in question - there are military units (including some very skilled Spec Ops units in China) using the CQ, as well as Chinese client states like Iran and Paraguay. There is absolutely no requirement for feed ramps in a semi automatic AR15 rifle, and some pretty knowledgeable people point out that the M16 and XM177 / CAR series military guns ran fine without them for 30 plus years, so really the necessity is questionable. The CQ runs fine as it is, it lacks some refinement in finish, but the vast majority will shoot into 2 inches with no problem and they are (on average) hugely reliable. Most folks have no reliability issues with the CQ. One last thing - any M4 type rifle that does not have the ability to fire fully automatic is by definition not Milspec, since the TDP specifies select fire capability.
Click to expand...


Very well defined . Thanks for that
 
The feed ramps were put into the m4 by colt. It is to deal with the steeper bullet profile of ss109 and the faster bolt speed of carbine in returning to battery.
 
enefgee said:
The whole concept of Milspec is somewhat misleading - for example Knights Armament rifles can also said to be not Milspec, as can Colt Canada's C8 and C8IUR - they don't conform strictly to the US Gov's M4 technical data package (TDP) for the rifle, they exceed it in many ways and they are an issued rifle to very select units, despite not being a true "milspec" gun. Additionally, we tend to look at the US military specification as the only one, since they originated the TDP in question - there are military units (including some very skilled Spec Ops units in China) using the CQ, as well as Chinese client states like Iran and Paraguay. There is absolutely no requirement for feed ramps in a semi automatic AR15 rifle, and some pretty knowledgeable people point out that the M16 and XM177 / CAR series military guns ran fine without them for 30 plus years, so really the necessity is questionable. The CQ runs fine as it is, it lacks some refinement in finish, but the vast majority will shoot into 2 inches with no problem and they are (on average) hugely reliable. Most folks have no reliability issues with the CQ. One last thing - any M4 type rifle that does not have the ability to fire fully automatic is by definition not Milspec, since the TDP specifies select fire capability.
Click to expand...

Very informative!
 
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