10.5" 300 BLACKOUT Parkerized Heavy Barrel AR15 Upper Assembly with 10" Rail and A2 Flash Hider
The 300 AAC Blackout was designed to achieve energies like the 7.62x39 Soviet in an AR16 while using standard AR15 magazines at their full capacity. The 7.62 Soviet's cartridge taper prevented reliable feeding in AR magazines and created wear on the bolt. From the 14.5in barrel of the AR15, the 556 round has an effective point target range of 500 yards. The bullet has significant drop, drift, and energy loss at that distance. From a 16in barrel, a 125gr 300 BLK round has a lower velocity and similar bullet drop and drift at shorter distances. However, it has the same amount of energy at 700 yards that the 556 has at 500 yards. In terms of hit probability, the Blackout has an effective range of 450 yards. From a 9in barrel, the 125 gr BLK round has the same muzzle energy as the 556 from a AR15, and 5 percent more energy at 440 yards. In comparison with 7.62×39mm rounds, 300 BLK rounds with varying loads have a better ballistics and more energy out of similar length barrels.
- 10.5" 300 BLACKOUT 4150 Chrome Moly Heavy Contour Parkerized Barrel with 1x8 Twist and 5/8x24 Threads
- Mil-Spec Upper Receiver forged from 7075 T6 aluminum with forward assist and dust cover assembly installed. Hard coat anodized MIL-STD 8625 Type 3 Class 2
- 10" Narrow Profile Free Float Rail machined from 6061 T6 aluminum Very comfortable and very light weight. Your choice of M-LOK or KEYMOD attachment points along the entire length at 3, 6, and 9 positions. Hard coat anodized MIL-STD 8625 Type 3 Class 2
- 0.750" Low Profile Gas Block
- Pistol Length Gas System
- Mil-Spec A2 Flash Hider with crush washer
This upper assembly will fit all standard AR15 lower receivers.
This item is "Firearm Parts", not a complete firearm (no serialized components). It will be shipped directly to you with no FFL transfer required.
You are responsible for knowing federal, state and local laws applicable to this item. AR15Parts.com reserves the right to not ship to addresses where it may not be legal to own this item.
ReviewsJohn StephensClaud Casey
10.5 inch 300 blackoutVery nice quality well made. Will definitely order more stuff from them.Anonymous
Excellent Upper!Great Customer Service, Fast Shipping and the upper is perfect. Fit and finish are perfect and no issues noted during assembly, Have not been to the range to try it out, but expecting great results.Jay
Great productsFast shipping/ excellent partsC.Smith
10.5 upper 300 blkThis is an amazing company great shipping time. Updated throughout the whole process. 300 blk upper was suppose to be m lok. There might have been an disclaimer saying it was going to be key mod but I donâ€™t remember. Finish was excellent. Barrel shot tight groups. Iâ€™m very pleased with everything and item wasnâ€™t overpriced. Great Job you Guys/Gals at your company!!Anonymous
10.5â€ 300 Blackout upperJust received this upper. Havenâ€™t shot it yet but it looks beautiful. Looking forward to trying it out.Walter Worley
Really nice quality upper that shoots very well...Actually purchased the 10.5" 1x7 upper - not the one listed here. Shipping was atrocious, but that's the fault of USPS - took 7 days for a Priority Mail pkg from up around Dalls, Tx to the Houston area. The upper arrived in good shape and fit up very well to the pistol lower I had built for it - very little play between upper and lower. Added my bcg and handle, checked headspace and took it out to shoot. Very tight groups at 50 yds and should only get better as the bore wears in a bit - really going to enjoy this combo !!!Christopher Ray
Get pricing and fast shippingOrder was recieve in a timely mannerPhilip Orrell
My favorite AR buildI've officially put 20 rounds through it so far and zeroed my preferred red dot on it. It's without a doubt my favorite AR build so far!Steve Belcher
ReviewEverything looks good , havent shot it yet so dont know how it shoots
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DetailsCurrent Stock: 198SKU: UA30B10PA08HC24P_10ML00_A2UPC:Availability: Usually Ships in 24 HoursOld SKU: 105300BOCMPU1x7MLR