18" 450 Bushmaster Upper Assembly AR 15 Rifle Length Rail

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List Price: $489.99

Our Price: $269.99

Savings: $220.00

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

Add A Magazine*:
Choose A Different Muzzle Device*:
Choose Keymod or M Lok Slots*:
Bolt Carrier Group:
Charging Handle:
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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.

*Compact competition muzzle brake with crush washer.

*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: Average Rating: 5 of 5

5 of 5 Total Reviews: 22 Write a review »

0 of 0 people found the following review helpful:

A++ Experience	March 20, 2020
Reviewer: douglas rose from sunbury, OH United States

Ease of online shopping experience, and received exactly what I ordered in a very timely manner.

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0 of 0 people found the following review helpful:

Fantastic upper	March 8, 2020
Reviewer: Anonymous Person from San Antonio, TX United States

Works very well with my lower and has not had any feeding issues.

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0 of 0 people found the following review helpful:

450 upper	December 21, 2019
Reviewer: Jason

Very good upper. Swapped out from my 556 to those and it shot very good group right off
the bore sight

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0 of 0 people found the following review helpful:

450 Bushmaster Upper	November 19, 2019
Reviewer: AE from BROOKINGS, SD United States

I love this upper. Quality product, tack driver. Price was good very affordable and was delivered in 3 days! I will be recommending this product to friends.

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1 of 2 people found the following review helpful:

18" 450 Bushmaster upper, BCG, CH, Mag	October 14, 2019
Reviewer: Travis Edris from Selah, WA United States

I have been researching this round and buying a rifle chambered in 450 BM for longer than I'd like to admit. I finally, through the most ridiculous and exhaustive search and study, purchased an upper, BCG, CH and mag through AR15part. I was really happy with how fast it shipped, and was doubly happy with the quality of the parts. I was however skeptical of the reports of "one ragged hole" at 100 yds. I was also mildly concerned of feed and extraction issues. I waited until multiple range days to make this review and if you read nothing else: This thing SHOOTS! I am amazed at the accuracy, craftsmanship, and it cycles flawlessly! I will be buying from these guys again soon. Travis Edris out.

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