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 California Proposition 65 WARNING: This product can expose you to one or more chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
History
The 458 SOCOM Upper Reciever Assembly brought to you by Bishop Ammunition
Manufacturing is a complete ready to install upper assembly. There are no changes or
modifications required of any standard AR-15 Lower Assembly to install our upper assembly.
The 458 SOCOM uses standard GI magazines for 5.56 NATO/.223 Remington AR-15. Please
note that plastic magazines may not allow chambering of 458 SOCOM due to a ridge that is at
the center of the front of the magazine.
Our 458 SOCOM barrels are chambered with reamers specifically designed to the
published official design specifications for the 458 SOCOM cartridge. Our upper assemblies
will chamber any 458 SOCOM ammunition following commercially accepted chamber
specifications. This means that your rifle shall be able to feed, chamber, safely fire, and eject any
commercial 458 SOCOM ammunition. The 458 SOCOM, (SOCOM is an acronym for Special Operations Command), is an awesome cartridge that is basically a lengthened 50AE case, necked down to accept .458 projectiles, a over all length of 1.575", and with a rebated .308 head configuration. This cartridge is chambered in AR-15 platform rifles as well as Bishop Ammunition Manufacturing's Bolt Action Rifle. You can buy a complete AR-15 style rifle, (California Compliant and standard configuration), or just the complete upper receiver (with bolt carrier group), which mounts to any AR-15 style lower receiver with zero modifications, from Bishop Ammunition Manufacturing, LLC.
The 458 SOCOM was developed because of the lack of power inherent in the 5.56 NATO cartridge used in the M4 Carbine and the M16 Rifles currently in use in The United States armed forces. Members of the special operations command, Task Force Rangers, experienced dissatisfaction and concern that multiple shots were necessary to neutralize enemy combatants in Mogadishu.
This cartridge is designed to be 100% compatible with M4, M16, and AR-15 rifle platforms. There is no change to the buffer, buffer spring, charging handle, stock, GI Specification magazines, most aftermarket magazines, or the magazine well, trigger assembly or any other components of the lower receiver. The 458 SOCOM singles stacks in 5.56 magazines. A 10 round 5.56 magazine holds four (4) 458 SOCOM rounds. The 20 round magazine holds seven (7) rounds. The 30 round magazine will hold tern (10) rounds of 458 SOCOM.
Loaded new made ammunition is available from Bishop Ammunition Manufacturing, LLC.
The Upper
458 SOCOM Upper Assembly. Our upper receivers are custom built one at a time. Our
barrels are specially made for us to order and this is the part that delays delivery.
Each upper assembly that we make is custom made to the customer's specifications, not
what we have previously determined shall occur. There is a host of options available for our
customers. Because of this each upper assembly is hand assembled and takes 6 to 10 weeks for
delivery. We do however stress 100% satisfaction.
We insist on a stringent barrel break in procedure to assure long life and accuracy. To
order a upper assembly from us there are generally no additional costs over and above our stated
price of $750.00 for a fully assembled ready to fire upper assembly. All that is needed is
mounting on your AR-15 lower assembly with zero modifications and the mounting or your
sights or optics. We do require 50% down with the balance upon completion. Cerakote Finish is available for an additional $35.
Options
Barrel Length: 16" Barrel Profile: All our barrels are a bull style profile. This is for safety and accuracy. Fluting is
available as a special order but is not advisable as it does not significantly lighten the barrel and
decreases accuracy. Fluting is quoted upon request as there are 8 different types available. There is a charge for fluting.
Finish: Polished, Black Oxide, Cerakoted (almost any color is available at an additional cost $35.00) Gas Block: Low Profile No additional charge
Low Profile With Rail No additional charge
Front Guard: UTG Mid or Full Length Free Floated
Number of Rails - 1
Color of Front Guard - Tan, Black, Dark Earth
Forward Assist: A1, A2, Tear Drop, No Froward Assist
Charging Handle: Standard GI, Tactical (at additional cost), Ambidextrous (at additional cost), Gibbz Side Charger (at additional cost)
Personalization: Laser Engraving is available for an additional charge. One line on either
the left or right side of the receiver. There is a $20.00 set up fee for this and a charge of an additional $35.00
- Barrel Length: 16", 18", 20"
Barrel Profile: All our barrels are a bull style profile. This is for safety and accuracy. Fluting is available as a special order but is not advisable as it does not significantly lighten the barrel and decreases accuracy. Fluting is quoted upon request as there are 8 different types available. There is a charge for fluting.
Finish: Polished, Black Oxide, Creakoted (almost any color is available at an additional cost $25.00)
Gas Block: Low Profile No additional charge
Low Profile With Rail No additional charge
Forend: UTG Full Length Free Floated
Number of Rails No additional charge
Color of Forend - Tan, Black, Dark Earth
Forward Assist: A1, A2, Tear Drop, No Froward Assist
Charging Handle: Standard GI, Tactical Ambidextrous
Personalization: Laser Engraving is available for an additional charge. One line on either the left or right side of the receiver. There is a $20.00 set up fee for this and a charge of an additional $35.00
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