16" 458 SOCOM Stainless Bull AR15 Rifle Upper Assembly with 12" Rail and Competition Muzzle Break
The .458 SOCOM is a moderately large round designed for a specialized upper receiver that can be mounted on any AR-15 pattern lower receiver. The 300-grain round offers a supersonic muzzle velocity of 1,900 ft/s and 2,405 ft⋅lbf, similar to a light .45-70 but with a much smaller case. The cartridge case design was finalized based on discussions with Tony Rumore at Tromix.
- 16"458 SOCOM 416R Stainless Steel Bull Contour Barrel with 1x14 Twist and 5/8x32 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. Properly modified for the large bore 458 SOCOM cartridge with a single feed ramp and an enlarged ejection port.
- 12" 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.
- 0.875" Low Profile Gas Block.
- Carbine Length Gas System.
- Competition Muzzle Brake with crush washer.
- AR15parts will customize (to your specificaions in the drop down menu) your AR15 upper with the Rail Type (M-LOK or KEYMOD), a Magazine or two, one of our High Quality Bolt Carrier Groups, and your choice of 5 different Charging Handles.
458 SOCOM NOTES
- BOLT/BCG: Reliable cycling and firing of 458 SOCOM ammunition is significantly improved by a high quality bolt desgned specifically for 458 SOCOM cartridges. The 458 SOCOM bolt included with our 458 SOCOM bolt carrier group (BCG) is specifically engineered with the critical features that ensure consistent performance of our 458 SOCOM upper assemblies.
- LOADING: Only load 458 SOCOM ammunition from a magazine. DO NOT load through the ejection port as a slam fire can occur upon bolt release.
- ALUMINUM GI MAGS ONLY: We only recommend and sell D&H Tactical Aluminium magazines for 458 SOCOM ammunition. Polymer magazines can swell or flex, creating opportunities for misfeeds, jams, and other issues that aluminum magazines eliminate.
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.
ReviewsShawn WGreat purchase, fast service. I had a question and the support staff was on it!!! I look forward to ordering from these professionals again.Joshua
Very happy!!Fast shipping! Very happy with my purchase. Fired very well. Using the 4 round magazine I ordered along with the upper and some old metal military mags I had it ran flawless. No feeding issues at all and very tight groupings right out of the box. Would highly reccommend giving this a go. You wont be disappointed.Juan Rivera
458 socomGood looking upper and good shootingjason
SweetLooks good feels good havent shot it yet arrived a little late but expected considering the timesJim Lacey
Upper assemblyI like the way the assembly looks, it seems to be well built however at this time I have not finished assembling the entire rifle as I am waiting on more parts from other suppliers. I hope it performs as well as it looks, if so it will be well worth the price I paid for it. I ordered the part during the height og the China Virus Hoaxdemic so the shipping was slightly longer than usual, but it was still relatively fast compared to orders I have placed with most of my vendors. Based on that criteria I will give 4 stars, I would like to give a better rating but I still have not been able to see the assembly function as a complete rifle yet although from what I see I believe it will likely function as I expect it to.Anonymous
PerfectGreat quality and shoots great. Fast shipping and packaged well.todd froelich
It lives !Shipped out fast , received it , inspected it , put it on a polymer lower and ran a 100 rnds of multiple bullet configurations and no problems ! Great product . Thanks AR15PART.COMFelix Carcamo
Great Upper for the pricegreat quality part are on this upper. Shoot different rounds and have not gotten any issues with feeding, ejecting or jams.Raymond Fowler
458 docomGreat service in bad timrs.Raymond Bacon
458 socom upperOrdered it got it back fast I was happy with my purchase I have not shot it yet but upper looks just like I expected
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DetailsCurrent Stock: 37SKU: UA45S16SS14B832C_12ML00_CBUPC:Availability: Usually Ships in 24 HoursOld SKU: 16458CMU1x14MLMLR