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Most large frame ARs make you pick between barrel length and carry weight. The NEMO XO Carbon skips that compromise entirely. Its 20-inch Proof Research carbon fiber wrapped barrel gives .308 Winchester the runway it needs to build full velocity, while the carbon fiber construction keeps the rifle at roughly 8.2 pounds unloaded. That is legitimately light for a full-length .308 AR, and you feel the difference the moment you shoulder it, whether you are packing into elk country or settling in behind a bench for long range work.
NEMO machines the matched upper and lower receiver set in-house from 7075 billet aluminum, then finishes everything in a clean Tungsten Cerakote. Controls are fully ambidextrous, with the safety, mag release, and bolt release all mirrored so left-handed shooters get the same experience as everyone else. The 1:10 twist barrel stabilizes the heavier match bullets that .308 fans like to run, and the adjustable gas block lets you tune the rifle for suppressed or unsuppressed shooting and different ammo without fighting excess gas.
The details here are where your money goes. NEMO's patented recoil reduction bolt carrier takes real bite out of the .308 impulse, and the titanium dual chamber muzzle brake knocks down what is left, so follow-up shots come back on target fast. A crisp two-stage Geissele SD-E trigger breaks clean for precision work, titanium takedown pins shave weight where they can, and the 14.75-inch free float M-LOK handguard leaves plenty of room for bipods, lights, and a solid support-hand grip. Magpul furniture rounds it out with a CTR stock and MIAD grip, plus a 20-round Gen3 PMAG in the box.
This is a rifle for people who want one .308 that does it all: steel at distance, hunting seasons, and range days that stretch past a few hundred yards. It is a premium build from a Montana shop that treats big-bore ARs as their specialty, and it shows in every component.
Right around 8.2 pounds unloaded, which is impressively light for a full-length .308 AR. The Proof Research carbon fiber wrapped barrel is the big weight saver, and touches like titanium takedown pins and a titanium muzzle brake trim ounces elsewhere. Most steel-barreled 20-inch AR-10s run noticeably heavier.
Yes. The adjustable gas block has settings for suppressed and unsuppressed shooting, so you can dial the gas back and keep the rifle running smoothly with a can attached. You would just remove the factory muzzle brake and install your suppressor mount of choice on the threaded barrel.
It is one of the better big-frame ARs out there for lefties. The safety, magazine release, and bolt release are all fully ambidextrous, and it ships with an ambi charging handle as well. Everything you need to run the rifle is accessible from either side.
Proof Research barrels have a strong reputation in the precision world, and the 1:10 twist stabilizes heavier .308 match loads like 168 and 175 grain bullets nicely. Paired with the Geissele SD-E two-stage trigger and a free floated handguard, this rifle has the ingredients for sub-MOA performance with quality ammo. Carbon fiber wrapping also helps the barrel shed heat during longer strings.
| UPC | 856458004820 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | XO308-20CF |
| Action | |
| Barrel Length | 20" |
| Caliber/Gauge | .308 / 7.62 NATO |
| Capacity | 20 |
| Color | TUNGSTEN |
| Model | |
| Product Type | AR |
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