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18" 450 Bushmaster Upper Assembly AR 15 Rifle Length Rail
18" 450 Bushmaster Upper Assembly AR 15 Rifle Length Rail


 
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List Price: $489.99
Our Price: $279.99
Savings: $210.00

Availability:: Usually Ships in 24 to 72 Hours
Product Code: 18450CMU1X24RLMLR


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Choose A Different Muzzle Device*:

Choose Keymod or M Lok Slots*:

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Description Additional Info
 

18" 450 Bushmaster Upper Assembly AR 15 Rifle Length Rail


*Milspec forged aluminum upper receiver with forward assist and dust cover assembly installed. Matte black hard coat anodized Mil 8625 Type 3 Class 2. One large single Feed Ramp for big bore cartridges. Forged from 7075 T6 aluminum. This receiver has been correctly modified around the ejection port to allow for clearance and proper ejection of the 450 Bushmaster cartridge.

*12" Rifle Length Narrow Profile Free Float Rail. Very comfortable and very light weight. Your choice of Keymod or M Lok slots. Slots run the entire length of our rail at the 3, 6, and 9 o'clock postions. Picatiny rail sections NOT included but are available for purchase on our website if needed. Rail sections easily attach to our rails for adding accessories like bipods, flash lights, grips, lasers, etc.

*18" 450 Bushmaster 4150 Hardened Chrome Moly Steel Barrel with 1x24 twist. Heavy Contour with 5/8x32 muzzle threads. Proper single feed ramp for 450 Bushmaster cartridge. Parkerized finish.

*.750 low profile gas block.

*Mid Length Gas Tube.

*AS OF 01-11-2019 WE HAVE A MINOR DISRUPTION IN OUR NORMAL MUZZLE BRAKE SUPPLY FOR THIS CALIBER AND WE ARE NOW SUBSTITUTING IT FOR A NEWER STYLE AS SEEN IN THE ADDITIONAL PRODUCT PICTURES. SEE OPTIONS TAB FOR MUZZLE DEVICE TO CHOOSE A DIFFERENT STYLE IF YOU WISH.

*This upper assembly will fit all standard AR 15 lower receivers.

This item IS NOT A FIREARM!!! It is only "Firearm Parts", so no FFL is needed and it can be shipped directly to you. You are responsible for knowing your state or local laws. We will not ship this item to areas where it is not legal to own..


Average Rating: 5 of 5 Total Reviews: 10 Write a review »

  0 of 0 people found the following review helpful:
 
450 bushmaster upper January 17, 2019
Reviewer: Anonymous Person from N richland hills, TX United States  
Excellent shooting upper well made good price

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  0 of 0 people found the following review helpful:
 
What more could I ask for? January 5, 2019
Reviewer: GottaLoveARs from Central PA, USA  
While there was a simple build problem with this order, AR15Part worked quickly to resolve it at no cost to me. Once I got everything together, and although I would have been happy with a 1.5 to 3 inch gun at 100 yds, it looks like it's going to be capable of under an inch. Not that you need that in a gun like this, but accuracy is almost always more fun. On top of all that, it looks great and has functioned flawlessly. So, like I said, what more could I ask for? Thanks to AR15Part for a great deal on a great upper in a really interesting caliber.

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  0 of 0 people found the following review helpful:
 
Sooooo awesome ! December 18, 2018
Reviewer: Coty H. from Michigan, United States  
First of all, Mr. Ketchum, I want to thank you for letting me modify my order to get this upper with the 15" keymod handguard ! The assembly and shipping was very quick. The quality is outstanding ! Got my rifle assembled the day I recieved my package. Took it to the range today (12/18) & shot 1/2 groups at 100yrds ! Very consistantly & it looks gorgeous ! This company receives a 10/10 from me ! Will definitely order from them again & spread the word about this company ! Thank you sir, you guys are awesome !

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  0 of 0 people found the following review helpful:
 
Best decision ever! December 15, 2018
Reviewer: Reese M. from Marshalltown, IA  
Very well built upper that a friend recommended to me.  Already own a 458 and love it but needed this to hunt with so didn't need the bcg.  Upper performed flawlessly with my bcg and charger.  Got better groups for some reason than my Tromix 458 which was the big surprise.  Got 1" groups with Hornady Black 250 gr.  If you are looking for a midwest hunting rig, buy with confidence.

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  0 of 0 people found the following review helpful:
 
December 11, 2018
Reviewer: Matt Asay from Evanston, WY United States  


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