Kinda true.
For work sure they get dinged or crushed you get a new one. ( no cost.)
But for the gamer big bucks.
My favorite system is still the URX4. Feels the best in hand
Monolithic uppers in one piece with non-detachable lower portion, like the LMT MWS and Colt IUR, exist because of the desire to mount QD grenade launchers while keeping the barrels free floated.
The sopmod 2 back in the days went into great length to mount M203 without using the barrel as a mounting part, that was the start of the monolithic upper idea. That is why we ended up with these weird dimension and barrel nut like the DD RIS2 and KAC URX. If the GL is mounted solely to a detachable lower hand guard, it will not survive. It was also needed back then because a lot of M4s are still the non-heavy barrelled version.
Then the US signed up for the HK M320 GL, all a sudden no one cares about this anymore because these new double action GLs are so big, carrying it as a stand alone makes more sense. The Eagle launcher is pretty big too. Mounting these new DA GLs on rifles make the weapons very bulky.
Both LMT and CC are sticking to this type of monolithic uppers, because they both have QD GL launchers that go onto the rail directly. Since they go with this, they can have skinny barrels. HK doesn't care about being monolithic because they have decided to have 0.85" barrel for HK416 no matter what, and will use the gas block as the attachment point. SCAR's GL is QD, but the lower rail is attached to the barrel and the whole thing is bolted down to the upper from front to rear
It comes down to how the design people want to integrate the GL, but if the trend is to carry the GL as a standalone, the whole thing becomes a moot point.
The trend is not so much about being monolithic or not. The trend is about how GL will be carried and whether 40mm LV is still the way to go. The whole weapon design is concerning what the grenadier is supposed to do, dropping bombs full time or having a monster weapon that does not do everything well but ok on average.
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