18" Midlength 6mm ARC Medium M-LOK Upper Assembly - 28378
Only 2 left in stock
18″ 6mm ARC Medium Midlength M-LOK Upper Assembly
A premium upper assembly engineered for precision without compromise. This means starting with a top tier mil-spec forged upper receiver, using a nitrided steel gas block as opposed to phosphate or aluminum, quality American Made M-LOK handguards and one of the finest nitrided barrels you’ll find anywhere. This also means taking the time to ensure that the upper will function flawlessly with the advanced 6mm ARC cartridge. We use Permatex 242 on key components while using mil-spec AEROSHELL 33MS Anti-Seize grease on the properly torqued barrel nut and muzzle device.
Bottom line is this: you hear all the time about guys buying a budget upper and it not delivering the precision potential that the 6mm ARC was designed for, or having to send it back because of some hardware defect or other issue caused by a careless assembly process. That is why we use top tier components and assemble each unit to the highest standard of quality. We want your upper to deliver the exceptional long-range performance that makes 6mm ARC special. In fact, we guarantee it will.
Buy with confidence, this upper is backed by our 30 day satisfaction guarantee. Buy it, run it, push it to 800+ yards, and if you aren’t satisfied you can send it back for a full refund.
Handguard style may vary from batch to batch
Lifetime Warranty
Guaranteed Sub-MOA performance with quality match grade ammo and proper shooting technique
Made in the USA
| Weight | 65 oz |
|---|---|
| Dimensions | 20 × 5 × 5 in |
| Barrel Finish | Nitride / Melonite |
| Barrel Profile | Medium |
| Cartridge Compatibility | 6mm ARC |
| Barrel Length | 18 |
| Gas System Length | Midlength |
| Twist Rate | 1-7 |
| BCG / Charging Handle | Not Included |
| MPN | 28378 |
| UPC | 28378 |
Compliance
NFA (National Firearms Act) compliance is crucial for legal ownership and transfer of regulated firearms and accessories like short-barreled rifles, suppressors, and certain types of ammunition, ensuring adherence to federal regulations to avoid legal penalties and ensure responsible firearm ownership.
Customer Reviews
- Reviews
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US
Worth the risk
Can't go wrong with a sub moa garentee for $300. With that being said, here's my experience. It's advertised as a 1/7 twist barrel. The barrel I got was a 1/7.5. Not a big deal as the 7.5 will still stabilize the load I plan on shooting. Not a huge fan of the handguard. It looks nice, but I don't really like how long it is (personal preference) . It's 17 inches long and has a friction fit lock up. My first time shooting it was disappointing. My best group was 1.9 inches and the rifle was undergassed. It wouldn't consistently cycle or lock open on the last round. I opened the gas port .006", lapped/ squared the reciever and bedded the barrel. My second trip to the range had much better results. My best group was .37"and the rifle cycled perfect every time. It still could use a little bit more gas but it's been reliable so far. I only have 200 rounds through the rifle but I believed it's going to be a solid rifle, especially for the price.
