Insofar as the QTS-11 can't replace carbines, yes. But given its unusually light weight for an OICW system, it makes sense to replace QBZ-95 with the QTS-11 to transform the average infantryman from a suppression tool to a destruction tool.
11 pounds is not light for a main line infantry weapon. It is also not overly heavy M14 Rifles weigh 11 pounds As do a nymber of Modern LMG's however although weight is not an issue Cost is. The system ( Rounds Optic, Weapon and training) will cost far more than a conventional rifle.
The QBZ95 is a carbine. That's the point of the Bullpup configuration, To reduce the length of the weapon well getting a full length barrel. Furthermore the Replacement of the QBZ95 already exists The QBZ95-1.
The Critical element you consistently miss is that infantry rifles although capable of Suppressing fire IE Selective fire they are more often used in Semiautomatic mode. This is the critical correction made in the QBZ95-1 The easy to use fire selector.
The previous iteration of the QBZ95 had the fire selector located near the rear of the stock/Receiver meaning that a soldier using it had to set the selector before engagement. I E lad a magazine, Do not chamber a round set the selector and n Engagement chamber and fire. Any Trained infantryman on contact will go to semi auto as the more reliable and more accurate mode of fire. Full auto fire or Suppression from the Infantryman only really comes in in 1 of 3 conditions.
- The Shooter is poorly trained. The Selector of the AK the weapon most commonly seen in poor armies of the World is said to have been designed with this is mind. To try and Encourage semiautomatic fire the switch goes from safe to full auto to semi this is so that a shooter in a panic hitting the selector with an adrenalin high will knock it all the way to semi auto.
- The Squad is attempting to Break contact and wants to keep heads down.
- Close range fire. Where volume of fire into close targets is more damage to the adversary.
Another thing going for the QTS11 is the increasing proliferation of level 4 plates. Short of a revolution in small arms tech, it is hard to see how you are going to be able to reliably punch through lvl4 plates while still keeping the caliber (and weight of the weapon and ammo) within acceptably limits.
Level 4 plates are an issue, however the QST 11 Airburst is not targeted to that. The Carbine component is not going to Defeat level IV plates any better then the QBZ 95. The Airburst Element seems oriented to defeat unarmored foes in Defial.
The Shockwave against armored troops in very close confined space might do some splash damage but the fragmentation effects aren't likely to do much.
The QTS11 nicely sidesteps that thorny issue by keeping the current small cal primary rounds, while adding a modest amount of weight to give your troops an effective counter to lvl4 plates, that will also be effective against unarmoured foes.
So which are you facing Armored forces or unarmored?
The bolt action single round design of the grenade launcher is less of an issue if the entire squad is armed with these.
A very specialized tool with a high price point. Equipping a couple per Squad maybe but a whole squad seems highly unlikely.
The costs will be higher obviously, but then China won’t be looking to rolling these out to everyone. If they just equip their marines and tier 1 primere combat units with these, the costs would be managible, while the benefit could be immense. Especially in an urban environment against foes with lvl4 plates.
Wait but you just said "The bolt action single round design of the grenade launcher is less of an issue if the entire squad is armed with these."
And you have other issues now. Marine forces need weapons suited to their Amphibious and expeditionary role. for them It's it better to have a smaller logistics train as it means having to find ways of hauling more.
Tier 1 are Special operations units who tend to operate off the books These tend to fall into Unconventional, Counter terrorism, Direct Action and Special reconnaissance. They are in Conventional war deployed behind enemy lines or conducting raids, Although a system like the OST 11 might be chosen I doubt a pure force. due to the extra weight and specialized nature.
Frankley on the Whole it falls better into a substitution for the Under barrel launcher in the squad rather then a pure fleet force. The Effectiveness of the Airburst round vs Level IV body armor has yet to be proven. however there are a few elifants in the room
Short of a revolution in small arms tech
The US M993 AP round already defeats level IV however that is the 7.62mm version and it has a very pricey and potentially Strategically recourse for the US. IE the US produces no tungsten it comes from South Africa, Russia and Of course the PRC.
If that is not enough Remember that there are already widely fielded weapons of a more conventional nature that can be just as if not far more destructive in most modern armies Rifle squads.
The underbarrel Grenade launcher of the 35-40mm varieties and recoilless systems.
As well as moving up in caliber from the .2xx caliber range to the .3xx range with a ultra high velocity, suposedly the there is a 6.8mm UHV round in the world right now.