8.6x70 is the same dimensions as .338 Lupua magnum.
However... That "Type 13" projectile.... yeah.... No.
The way it's pictured is to big to load in a magazine it's also not tapered enough for proper firing and why is it purple? Something about that seems... off. It looks like a Prop from the Runaway.
The article linked to it also to has errors. It mentions the U.S. LWMMG and claims it fires .338LM it doesn't it could but the case and shape are longer instead they chose .338 Norma Magnum (8.6x63mm) because they felt the cartridge would cycle better. He also claims it's based on M240 , this is wrong. It has as much in common with M240 as your car does the Moon buggy. The LWMMG is based on a recoil operation where the M240 is based on a long stroke gas piston. The tell of this is when firing the barrel of the LWMMG recepericates.
It's said that a new 8.6mm(.338 equivalent) high precision sniper rifle will show up at Zhuhai this year. It's apparently a product of Hu Nan Armory
Okay now this "Feels right" a modern sniper rifle in a metallic modular chassis system with adjustable length of pull.
Two top tails one for the scope and one for night vision