The XM250 has 110 base damage, slightly lower than the 120 damage LMGs, but still enough to 2 shot headshot with skills.

The rate of fire is at an average 750 RPM. There's no data online on what the real RPM is, so I just went with 750 as decent all around automatic weapon RPM. I am assuming the actual fire rate would depend on the condition of the weapon itself, such as whether or not the weapon is dirty or was previously fired or not.

The ammo capacity is a 50 round belt is terrible compared to most other LMGs, but you make up with it for a reload speed matching most magazine fed weapons. Notably, the empty reload is faster than the non empty reload due to the use of the spoon feeding method.

The ammo capacity is also subpar 4 belts/boxes carried, totaling at 200 total bullets.
The ammo pickup is somewhat low for an LMG at 6-10 bullets of pickup, but that's what special snowflake ammo does to you: makes it annoying to procure more ammunition. It still should be plenty to spray things down in true LMG fashion.

The XM250 has a decent base accuracy of 48, boosted by default mods. If you want to snipe, try to fire in short bursts, or mount up on a bipod to direct your fire onto target.
The XM250 has subpar stability at 28, however the kick is rather manageable and consistent for a LMG. Try to fire in short bursts or mount up on a bipod to control the weapon.
The XM250 has a concealment of 2, but concealment is a dump stat on most of the LMGs anyways.

Because the gun is chambered in XM1186 cartridge, the XM250 can pierce body armor and walls but not enemies or shields. While this is less powerful than the XM1186 available on my MCX Spear, this is for game balance (or some semblance of it): the XM250 with enemy and shield penetration would have a do it all horde clearing weapon except at the longest of ranges.

In terms of attachments, your selection is limited to mostly universal attachments: gadgets, muzzle devices, and sights.
The unique attachments come in the form of the Vortex NGSW, SLX Suppressor, and SIG Sauer Canted Irons as default optics/secondary sights for the sake of completing the NGSW-AR look.

-Animation-wise, it's not strictly necessary to rack the charging handle every time you want to reload while you have some rounds in the belt. You could, but that might indicate your XM250 is having issues with getting on sear.

-The barrel does not reciprocate while firing, since there are limits to my animation budget.

-The stock is still using the prototype stock instead of the more up to date Magpul SL-M stock.

-If you're wondering why you can't mount AR15 pistol grips on what looks like your run of the mill SIG Sauer style AR15 pistol grip, not only am I not dealing with the headache of trying work with Akinaro's awful scaling, but the prototype NGSW trial version that Akinaro modeled off of did not allow generic AR15 pistol grips. The latest version of the XM250 (at the time of writing) is compatible with generic AR15 pistol grips.

-The receiver's textures has "SLMAG" written on the side, which incorrectly refers to the MG338 and not the XM250. I believe the correct NGSW trial era markings would have been "SLSAW".

-Akinaro's Bipod is incorrect. Not only are the feet incorrect in terms of model, but the gap between the bipod is a bit too long, and attempting to fold the legs has the legs awkwardly sticking just shy of the bottom of the receiver.

The legs fold into the receiver and should latch into place below the bottom of the handguard, such as in GarandThumb's video.