Radical Firearms Complete Upper Assembly .450 Bushmaster, 15in MHR, Single Ramp, Black, Box

Radical Firearms Complete Upper Assembly 16in .450 Bushmaster, 1/14 Twist, 15in FHR, KEYMOD, Black, CFU16-450BUSH-15FHR

Radical Firearms Complete Upper Assembly 20in .450 Bushmaster, 1/14 Twist, 15in FHR, KEYMOD, Black, CFU20-450BUSH-15FHR

Radical Firearms Complete Upper Assembly 16in .450 Bushmaster, 15in MHR, Black, CFU16-450BUSH-15MHR

Radical Firearms Complete Upper Assembly 20in .450 Bushmaster, 15in MHR, Black, CFU20-450BUSH-15MHR

Radical Firearms Complete Upper Assembly 16in .450 Bushmaster, 1/14 Twist, 15in FHR, KEYMOD, Black, CFU16-450BUSH-15FHR

Radical Firearms Complete Upper Assembly 20in .450 Bushmaster, 15in MHR, Black, CFU20-450BUSH-15MHR

Government Export Restriction

This item may be regulated for export by the U.S. Department of State or the U.S. Department of Commerce. Please see our Export Policy prior to placing your order.

Government Restriction

By adding to cart, I understand and agree to the Domestic Restricted Product Policy and certify that I will comply with applicable federal, state and local laws and regulations.

Questions & Answers

What is the twist rate of this Upper? Expert Answer

The twist rate is 1:14.

by Jonathan D., Gear Expert, April 22, 2018

See 1 More Answer

Do models that say they have a 20” barrel...actually have a 20” barrel? Does Radical have an answer for the fail to feed and extract issues? Thanks. Expert Answer

Yes, the barrel will be 20". Unfortunately, you will need to contact Radical Firearms about any modifications have been made to correct issues.

https://www.radicalfirearms.com/Contact_Us_a/83.htm

by Kurt Colbourne, Gear Expert, September 14, 2021

View All Q&A You Have a Question? Ask!

Customer Reviews

Helpful Positive Review

450 Bushmaster complete upper by Pickalo, February 18, 2018

Very easy to order. Product operated perfectly. Was able to track shipment and new when it was going to arrive. I would recommend radical firearms 450 Bushmaster complete upper to any one. The pricing was very comparable and shipping was great. Getti...
Read More...

1/2 found this helpful

Helpful Positive Review

450 Bushmaster upper by Jesse, December 14, 2017

For the price of this upper I was a little concerned that the quality would not be there. I'm glad to say I was wrong. This is a great upper at a great price. Had it sighted in with 6 shots and killed a deer with the 7th. I definitely recommend this ...
Read More...

8/8 found this helpful

Helpful Positive Review

20 450 bushmaster. Lots of fun. by Skipper, Verified Owner, November 6, 2017

My 3rd Radical Firearms upper. So far so good. BCG is a bit tight but should break in in a few more boxes of ammo. This IS a round you want to reload since finding factory ammo is kind of hit and miss. Recoil is pretty much a lot less than I was expe...
Read More...

4/4 found this helpful

Helpful Negative Review

Fails to Extract - Hard locked bolt by Ray, Verified Owner, November 24, 2017

Received the upper after some delay (10 weeks). Fits well on the lower, bolt is a little stiff, but workable after cleaning. Firing at the range, it is very accurate. However, the fired cartridges will not extract, basically have to disassemble the r...
Read More...

8/8 found this helpful

Most Recent Reviews

Good upper for the price. by Rusty Longiron, March 3, 2019

Just finished assembling the rifle. Gave it just a quick test fire off the deck. It fed, fired and ejected which is a good start. I had to use a standard 20 round 223 mag because for reasons I'm still waiting to find my upper did not have the 450 mag...
Read More...

0/1 found this helpful

Most Recent Reviews

Wouldn’t eject shells by Backfat, Verified Owner, November 13, 2017

I shot 2 boxes and it never ejected 1 shell. Sent it back and went with a different brand. Took a full 20 days to get and then it didn’t even work . I almost missed my hunting season waiting for this and then it not working and waiting for a new o...
Read More...

1/4 found this helpful

Read All 11 Reviews

Caliber:: .450 Bushmaster
Barrel Length:: 16 in
Gas System Length:: Mid Length
Barrel Twist Rate:: 1-20
Handguard Type:: Free-Float
Muzzle Device:: Panzer Brake
Finish:: Anodized
Color:: Black
Model:: 15in First-Gen Hybrid Rail System - FHR
Gas Block Journal Size-Diameter:: .936 in
Handguard Length:: 15 in
Handguard Style:: Hybrid Rail
Gun Rail:: KeyMod, M-LOK
Magazine Included:: Yes
Condition:: New
Length:: 16 in, 25.5 in
Threads per Inch:: 5/8x32

Code: 2CS-URC-CUA450-CFU16-450BUSH-15FHR

MPN: CFU16-450BUSH-15FHR

UPC: 816903027439

Product No Longer Available

Compare

Product Info for Radical Firearms Complete Upper Assembly .450 Bushmaster, 15in MHR, Single Ramp, Black, Box

Get a high powered firearm that will deliver your tightest groupings yet when you build your rifle with the Radical Firearms Complete Upper Assembly .450 Bushmaster. These AR15 Upper Receivers by Radical Firearms come complete and assembled so that you don't have to fidget around with parts or waste time building. The Radical Firearms Upper Assembly w/ MHR comes with an upper receiver, forward assist, custom ejection port door, barrel nut, 16in 450 Bushmaster barrel, Panzer muzzle brake, bolt carrier group, charging handle, and a 450 Bushmaster mag. You won't find a better collection of parts for this great of a value anywhere else on the market. Plus, you can utilize the M-LOK attachment points on the sides and bottom or the Picatinny rails at the fore end to mount optics, lasers, lights, bipods and other accessories to customize your rifle to its fullest potential. Pick up your Radical Firearms .450 Bushmaster Full Upper Assembly today to build a powerful rifle that will deliver optimum performance for life.

Features of Radical Firearms Complete Upper Assembly .450 Bushmaster, 15in MHR, Single Ramp, Black, Box:

Barrel Profile: Big Bore Profile
Barrel Material: 4140 Chrome Moly Vanadium
Barrel Finish: Melonite
Barrel Extension: Single Feed Ramp
Gas Block Type: .936 Low-profile Gas Block
Upper Receiver Material: Forged 7075 T6
Upper Receiver Style: M4 MIL-STD with Oversized Ejection Port
Upper Receiver Finish: Type III Anodizing
Forward Assist: Yes
Dust Cover: Yes
Charging Handle: MIL-STD
Bolt Carrier Group Included: Yes
BCG Finish: Nitride
Magazine: 450 7 Round
* Includes 1 Magazine

Package Contents:

Radical Firearms Complete Upper Assembly .450 Bushmaster, 15in MHR, Single Ramp, Black, Box

Ammunition

1–17 / 17

Best Rated

Hornady BLACK .450 Bushmaster 250 grain Flex Tip eXpanding Brass Cased Centerfire Rifle Ammo, 20 Rounds, 82246

(6)

List: $58.00 (Save 16%)

$48.49

$2.42/Round

Hornady American Whitetail .450 Bushmaster 245 grain InterLock SP Brass Cased Centerfire Rifle Ammo, 20 Rounds, 82242

(3)

List: $55.12 (Save 17%)

$45.99

$2.30/Round

On Sale

Barnes Vor-Tx .450 Bushmaster 250 Grain TSX FB Brass Cased Rifle Ammo, 20 Rounds, 32085

(3)

List: $63.99 (Save 27%)

$46.99

$2.35/Round

Final Sale

Fort Scott Munitions 450 BUSHMASTER 250 Grain Centerfire Rifle Ammo, 20 Rounds, 450BM-250-SCV1

Hornady American Whitetail Tipped 450 Bushmaster 250 Grain FTX Brass Cased Rifle Ammo, 20 Rounds, 82244

(13)

List: $59.21 (Save 16%)

$49.49

$2.47/Round

Hornady Subsonic .450 Bushmaster 395 grain Subsonic eXpanding Brass Cased Centerfire Rifle Ammo, 20 Rounds, 82247

(4)

List: $56.99 (Save 17%)

$47.49

$2.37/Round

Winchester Deer Season XP .450 Bushmaster 250 grain Extreme Point Polymer Tip Centerfire Rifle Ammo, 20 Rounds, X450DS

(4)

List: $81.41 (Save 18%)

$66.99

$3.35/Round

Remington Core-Lokt .450 Bushmaster 300 Grain Core-Lokt Pointed Soft Point Rifle Ammo, 20 Rounds, 27941

List: $67.99 (Save 10%)

$61.49

$3.07/Round

Remington Premier Accutip .450 Bushmaster 260 Grain AccuTip Rifle Ammo, 20 Rounds, 27943

(1)

List: $70.99 (Save 13%)

$61.49

$3.07/Round

Federal Premium Power-Shok .450 Bushmaster 300 Grain Jacketed Hollow Point Rifle Ammo, 20 Rounds, 450BMB

List: $66.99 (Save 10%)

$60.49

$3.02/Round

Federal Fusion .450 Bushmaster 260 Grain Soft Point Rifle Ammo, 20 Rounds, F450BMFS1

List: $73.99 (Save 29%)

$52.49

$2.62/Round

HSM 450BUSH1N Bear Load 450 Bushmaster 300 Gr Jacketed Soft Point JSP 20 Bx/

List: $88.49 (Save 38%)

$54.49

$2.72/Round

DoubleTap Ammunition 450Bushmaster 300gr Jacketed Soft Point Rifle Ammo, 20 Per Box/25 Case, 450B300SP

List: $89.93 (Save 22%)

$70.49

$3.52/Round

Barnes .450 Bushmaster 260 Grain Soft Point Brass Rifle Ammo, 20 Rounds, HV450B1

List: $67.99 (Save 15%)

$57.99

$2.90/Round

Remington UMC Rifle .450 Bushmaster 260 Grain Full Metal Jacket Rifle Ammo, 20 Rounds, 23661

(2)

List: $38.99 (Save 10%)

$34.99

$1.75/Round

Federal American Eagle Rifle .450 Bushmaster 260 Grain Full Metal Jacket Brass Rifle Ammo, 20 Rounds, AE450BM

List: $38.99 (Save 10%)

$34.99

$1.75/Round

Winchester Super-X RIFLE .450 Bushmaster 260 grain Power-Point Centerfire Rifle Ammo, 20 Rounds, X4501

(1)

List: $84.79 (Save 33%)

$56.99

$2.85/Round

Image of TRYBE Defense Standard Handguard Barrel Nut

TRYBE Defense Standard Handguard Barrel Nut (26) List: $18.99 (Save 98%) $0.44 Blazin' Deal

Image of Radian Weapons Glock 43X/48 Anchor and Pistol Magwell

3 models Radian Weapons Glock 43X/48 Anchor and Pistol Magwell (44) As Low As (Save Up to 33%) $109.99 Best Rated

DFCO Kung Fu Grip Plug (22) List: $12.00 $11.99 12% Coupon

Image of Kaw Valley Precision Stainless Steel Heavy Tungsten Buffer

2 models Kaw Valley Precision Stainless Steel Heavy Tungsten Buffer (54) As Low As (Save Up to 11%) $99.95 Best Rated

Image of Atrius Development G-Lever Ambidextrous Forced Reset Safety - Geissele Specific

Atrius Development G-Lever Ambidextrous Forced Reset Safety - Geissele Specific (15) List: $269.00 Add to Cart for Your
Special Price Blazin' Deal

Image of SB Tactical SBA5 5 Position Adjustable Rifle Brace

2 models SB Tactical SBA5 5 Position Adjustable Rifle Brace (171) List: $124.99 (Save 20%) $99.99 Best Rated

Image of Breek Arms AR-15 Warhammer Mod2 Ambidextrous Charging Handle

4 models Breek Arms AR-15 Warhammer Mod2 Ambidextrous Charging Handle (553) List: $54.95 (Save $5.00) $49.95 Best Rated

13 models DFCO Kung Fu Grip, Black (130) As Low As (Save Up to 15%) $19.99 12% Coupon

Magpul Industries B.A.D. Lever (406) List: $47.32 (Save 30%) $32.99 Best Rated

Image of Superlative Arms Adjustable Bleed Off Gas Block

16 models Superlative Arms Adjustable Bleed Off Gas Block (291) List: $99.99 (Save 10%) $89.99 Up to 14% Coupon