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Radical Firearms Complete Billet Side Charging Upper Assembly 7.5in 5.56 M4 Contour w/ A2 Flash Hider

Photo Coming Soon!
Government Restriction Government Restriction
Questions & Answers
Does this upper come with Bcg? Expert Answer

No, this upper does not include a bolt carrier group.

by Coyte I., Gear Expert, June 20, 2018
View All Q&A You Have a Question? Ask!

Product Discontinued by Manufacturer

Radical Firearms Complete Billet Side Charging Upper Assembly 7.5in 5.56 M4 Contour w/ A2 Flash Hider has been discontinued by Radical Firearms and is no longer available. Our product experts have helped us select these available replacements below.You can also explore other items in the Gun Parts, AR 15 Parts, Rifle Parts, AR15 Upper Receivers yourself to try and find the perfect replacement for you!

ATTENTION! We currently do not ship this product to P.O. Boxes, AK, CA, CT, DE, HI, MA, NJ, NY, U.S. Territories, or select Colorado locations. Please see our policies for more information or a detailed list of locations.

Product Info for Radical Firearms Complete Billet Side Charging Upper Assembly 7.5in 5.56 M4 Contour w/ A2 Flash Hider

The Radical Firearms Complete Billet Side Charging Upper Assembly 7.5in 5.56 M4 Contour w/ A2 Flash Hider was developed to function as the best product for anybody trying to find a top quality option..image

Developed working with some of the most extremely heavy duty and dependable substances available, these AR15 Upper Receivers by Radical Firearms can provide something that gives you many years of reliability.

Radical Firearms has been generating top quality merchandise for a number of years, and the Radical Firearms Complete Billet Side Charging Upper Assembly 7.5in 5.56 M4 Contour w/ A2 Flash Hider is their way of revealing exactly how much they care.

Right here at OpticsPlanet, we ensure that it is our responsibility to purchase the perfect product for all your needs, and presenting the Radical Firearms Complete Billet Side Charging Upper Assembly 7.5in 5.56 M4 Contour w/ A2 Flash Hider is one thing that we're delighted to offer.

Package Contents:

  • Radical Firearms Complete Billet Side Charging Upper Assembly 7.5in 5.56 M4 Contour w/ A2 Flash Hider

Ammunition

1–40 / 40
Previous
On Sale
PMC Ammunition X-TAC, 5.56x45mm NATO, 55 grain, Full Metal Jacket, Brass, Centerfire Rifle Ammo, 20, 556X
PMC Ammunition X-TAC, 5.56x45mm NATO, 55 grain, Full Metal Jacket, Brass, Centerfire Rifle Ammo, 20, 556X
(69)
List: $15.99 (Save 36%)
$10.16
$0.51/Round
On Sale
PMC Ammunition X-TAC Light Armor Piercing 5.56x45mm NATO 62 Grain Brass Cased Centerfire Rifle Ammunition
PMC Ammunition X-TAC Light Armor Piercing 5.56x45mm NATO 62 Grain Brass Cased Centerfire Rifle Ammunition
(116)
As Low As (Save Up to 29%)
$10.61
$0.53/Round
See all 2 models
Newly Added
Winchester Super Match
Winchester Super Match
As Low As (Save Up to $2.58)
$18.99
$0.41 - $2.37/Round
See all 10 models
Best Rated
Winchester USA 5.56x45mm NATO 62 grain Green Tip M855 Full Metal Jacket Boat Tail FMJBT Brass Centerfire Rifle Ammunition
Winchester USA 5.56x45mm NATO 62 grain Green Tip M855 Full Metal Jacket Boat Tail FMJBT Brass Centerfire Rifle Ammunition
(134)
As Low As (Save Up to 54%)
$12.99
$0.65 - $0.82/Round
See all 7 models
Best Rated
Winchester USA 5.56x45mm NATO 55 grain Ball (M193) Full Metal Jacket Brass Centerfire Rifle Ammunition
Winchester USA 5.56x45mm NATO 55 grain Ball (M193) Full Metal Jacket Brass Centerfire Rifle Ammunition
(147)
As Low As (Save Up to 26%)
$11.80
$0.59 - $0.78/Round
See all 6 models
Freedom Munitions 5.56x45mm NATO 55 Grain Full Metal Jacket Brass Rifle Ammunition
Freedom Munitions 5.56x45mm NATO 55 Grain Full Metal Jacket Brass Rifle Ammunition
(3)
As Low As (Save Up to 19%)
$29.49
$0.53 - $0.59/Round
See all 2 models
On Sale
Hornady Frontier 5.56x45mm NATO 55 Grain Brass Cased Full Metal Jacket Rifle Ammo, 250 Rounds, FR604
Hornady Frontier 5.56x45mm NATO 55 Grain Brass Cased Full Metal Jacket Rifle Ammo, 250 Rounds, FR604
List: $204.99 (Save 28%)
$147.61
$0.59/Round
Federal American Eagle 5.56x45mm NATO 55 Grain Full Metal Jacket Boat Tail Brass Cased Rifle Ammunition
Federal American Eagle 5.56x45mm NATO 55 Grain Full Metal Jacket Boat Tail Brass Cased Rifle Ammunition
As Low As (Save Up to 22%)
$67.49
$0.67 - $0.81/Round
See all 2 models
Hornady Frontier 5.56x45mm NATO 55 Grain Hollow Point Centerfire Rifle Ammunition
Hornady Frontier 5.56x45mm NATO 55 Grain Hollow Point Centerfire Rifle Ammunition
(3)
As Low As (Save Up to 24%)
$13.49
$0.65 - $0.69/Round
See all 3 models
Best Rated
Barnes Vor-TxRifle Cartridges, 5.56x45mm NATO, TSX Boat Tail, 70 Grain, 20 - Rounds, *31191
Barnes Vor-TxRifle Cartridges, 5.56x45mm NATO, TSX Boat Tail, 70 Grain, 20 - Rounds, *31191
(14)
List: $43.99 (Save 10%)
$39.49
$1.97/Round
Hornady Frontier 5.56x45mm NATO 62 Grain Full Metal Jacket Centerfire Rifle Ammunition
Hornady Frontier 5.56x45mm NATO 62 Grain Full Metal Jacket Centerfire Rifle Ammunition
(2)
As Low As (Save Up to 18%)
$14.49
$0.72/Round
See all 2 models
First Breach 5.56 NATO 55 Grain Full Metal Jacket Boattail New C220 Brass Cased Rifle Ammo, 1000 Rounds, 50009
First Breach 5.56 NATO 55 Grain Full Metal Jacket Boattail New C220 Brass Cased Rifle Ammo, 1000 Rounds, 50009
(1)
List: $599.99 (Save 17%)
$497.70
$0.50/Round
Newly Added
Atomic Ammunition Cycling Defense AD77 5.56x45mm NATO 77 grain Boat Tail Hollow Point Brass Cased Rifle Ammunition
Atomic Ammunition Cycling Defense AD77 5.56x45mm NATO 77 grain Boat Tail Hollow Point Brass Cased Rifle Ammunition
As Low As (Save Up to $13.01)
$30.74
$1.47 - $1.54/Round
See all 2 models
Best Rated
Hornady Superformance 5.56x45mm NATO 75 grain Boat-Tail Hollow Point Match Brass Cased Centerfire Rifle Ammo, 20 Rounds, 81264
Hornady Superformance 5.56x45mm NATO 75 grain Boat-Tail Hollow Point Match Brass Cased Centerfire Rifle Ammo, 20 Rounds, 81264
(8)
List: $41.40 (Save 23%)
$31.99
$1.60/Round
PMC 556M55BP Battle Pack 5.56 NATO 62 Gr Light Armor Piercing LAP
PMC 556M55BP Battle Pack 5.56 NATO 62 Gr Light Armor Piercing LAP
(1)
List: $89.00 (Save 17%)
$73.71
$0.61/Round
On Sale
Hornady BLACK 5.56x45mm NATO 62 grain Full Metal Jacket Brass Cased Centerfire Rifle Ammo, 20 Rounds, 81263
Hornady BLACK 5.56x45mm NATO 62 grain Full Metal Jacket Brass Cased Centerfire Rifle Ammo, 20 Rounds, 81263
(8)
List: $24.99 (Save 23%)
$19.30
$0.97/Round
Best Rated
Barnes Vor-TxRifle Cartridges, 5.56x45mm NATO, TSX Boat Tail, 62 Grain, 20 - Rounds, *31190
Barnes Vor-TxRifle Cartridges, 5.56x45mm NATO, TSX Boat Tail, 62 Grain, 20 - Rounds, *31190
(10)
List: $70.88 (Save 39%)
$43.49
$2.17/Round
AmmoDyn 5.56x45mm NATO 55 grain Full Metal Jacket Brass Cased Rifle Ammo, 30 Rounds, PM-55655-30
AmmoDyn 5.56x45mm NATO 55 grain Full Metal Jacket Brass Cased Rifle Ammo, 30 Rounds, PM-55655-30
List: $26.95 (Save 18%)
$22.09
$0.74/Round
Fort Scott Munitions, 5.56x45mm NATO, 55 grain, Copper Solid, Brass, Centerfire Rifle Ammo, 20, 556-055-SCV
Fort Scott Munitions, 5.56x45mm NATO, 55 grain, Copper Solid, Brass, Centerfire Rifle Ammo, 20, 556-055-SCV
List: $28.32 (Save 12%)
$24.88
$1.24/Round
On Sale
Prvi Partizan RangeMaster, 5.56 NATO, 55 Grain, Full Metal Jacket, 20 Round Box PPRM5561
Prvi Partizan RangeMaster, 5.56 NATO, 55 Grain, Full Metal Jacket, 20 Round Box PPRM5561
List: $31.47 (Save 60%)
$12.49
$0.62/Round
PMC 556XBP Battle Pack 5.56 NATO 55 Gr Full Metal Jacket Boat Tail FMJBT
PMC 556XBP Battle Pack 5.56 NATO 55 Gr Full Metal Jacket Boat Tail FMJBT
(1)
List: $140.00 (Save $12.51)
$127.49
$0.64/Round
Hornady Superfomance 5.56 Nato 55 Grain Copper Solid CX Brass Cased Centerfire Rifle Ammo, 20 Rounds, 812544
Hornady Superfomance 5.56 Nato 55 Grain Copper Solid CX Brass Cased Centerfire Rifle Ammo, 20 Rounds, 812544
(4)
List: $46.61 (Save 30%)
$32.49
$1.62/Round
Norma Range and Training 5.56x45mm NATO 55 Grain Full Metal Jacket Brass Cased Rifle Ammo, 20 Rounds, 701701313
Norma Range and Training 5.56x45mm NATO 55 Grain Full Metal Jacket Brass Cased Rifle Ammo, 20 Rounds, 701701313
List: $14.29
$13.49
$0.67/Round
Barnes Precision MatchRifle Cartridges, 5.56x45mm NATO, Match Burner Open Tip Match Boat Tail, 69 Grain, 20 - Rounds, *30846
Barnes Precision MatchRifle Cartridges, 5.56x45mm NATO, Match Burner Open Tip Match Boat Tail, 69 Grain, 20 - Rounds, *30846
List: $42.99 (Save 16%)
$35.99
$1.80/Round
PPU PPRM5561M 5.56X45 55 FMJBT RNGMSTR
PPU PPRM5561M 5.56X45 55 FMJBT RNGMSTR
List: $866.49 (Save $59.00)
$807.49
$0.81/Round
PPU 5.56x45mm NATO 0 grain Brass Cased Blank Ammo, 20 Rounds, PPB556
PPU 5.56x45mm NATO 0 grain Brass Cased Blank Ammo, 20 Rounds, PPB556
$1,667.49
$83.37/Round
Best Rated
Hornady BLACK 5.56x45mm NATO 75 Grain InterLock HD SBR Centerfire Rifle Ammunition
Hornady BLACK 5.56x45mm NATO 75 Grain InterLock HD SBR Centerfire Rifle Ammunition
(27)
As Low As (Save Up to 17%)
$30.49
$1.52/Round
See all 2 models
Veteran Ammo Defense 5.56x45mm NATO 62 grain Hollow Point Centerfire Brass Cased Pistol Ammo, 20 Rounds, HMBX-556-24
Veteran Ammo Defense 5.56x45mm NATO 62 grain Hollow Point Centerfire Brass Cased Pistol Ammo, 20 Rounds, HMBX-556-24
List: $49.99 (Save 23%)
$38.49
$1.92/Round
Best Rated
Hornady Frontier 5.56x45mm NATO 68 grain Boat-Tail Hollow Point Brass Cased Centerfire Rifle Ammo, 20 Rounds, FR310
Hornady Frontier 5.56x45mm NATO 68 grain Boat-Tail Hollow Point Brass Cased Centerfire Rifle Ammo, 20 Rounds, FR310
(15)
List: $19.60 (Save 16%)
$16.49
$0.82/Round
Veteran Ammo Defense 5.56x45mm NATO 62 Grain Full Metal Jacket Centerfire Brass Cased Pistol Ammo, 20 Rounds, HMBX-556-25
Veteran Ammo Defense 5.56x45mm NATO 62 Grain Full Metal Jacket Centerfire Brass Cased Pistol Ammo, 20 Rounds, HMBX-556-25
List: $49.99 (Save 22%)
$38.99
$1.95/Round
Best Rated
Hornady Frontier 5.56x45mm NATO 75 grain Boat Tail Hollow Point (BTHP) Brass Centerfire Rifle Ammunition
Hornady Frontier 5.56x45mm NATO 75 grain Boat Tail Hollow Point (BTHP) Brass Centerfire Rifle Ammunition
(29)
As Low As (Save Up to 17%)
$17.99
$0.90/Round
See all 2 models
Best Rated
Hornady Frontier 5.56x45mm NATO 55 Grain Full Metal Jacket Brass Rifle Ammunition
Hornady Frontier 5.56x45mm NATO 55 Grain Full Metal Jacket Brass Rifle Ammunition
(47)
As Low As (Save Up to 17%)
$13.49
$0.65 - $0.67/Round
See all 3 models
PMC Ammunition X-Tac Rifle Ammo 5.56 NATO 62 gr Green Tip 1000/ct, 5.56 M855 Case
PMC Ammunition X-Tac Rifle Ammo 5.56 NATO 62 gr Green Tip 1000/ct, 5.56 M855 Case
List: $739.99 (Save 13%)
$645.19
$0.65/Round
G9 Defense 5.56mm 54 Grain Barrier Blind Hollow Point Brass Cased Pistol Ammo, 20 Rounds, B-556-54A
G9 Defense 5.56mm 54 Grain Barrier Blind Hollow Point Brass Cased Pistol Ammo, 20 Rounds, B-556-54A
(2)
List: $53.99 (Save 18%)
$44.49
$2.22/Round
First Breach 5.56 NATO 55 Grain Full Metal Jacket Boattail New C220 Brass Cased Rifle Ammo, 20 Rounds, 556 55 loaded
First Breach 5.56 NATO 55 Grain Full Metal Jacket Boattail New C220 Brass Cased Rifle Ammo, 20 Rounds, 556 55 loaded
(2)
List: $15.99 (Save 13%)
$13.99
$0.70/Round
Century Arms MKE 5.56x45mm NATO 62 Grain Full Metal Jacket Brass Cased Rifle Ammo, 2250 Rounds, AM8303
Century Arms MKE 5.56x45mm NATO 62 Grain Full Metal Jacket Brass Cased Rifle Ammo, 2250 Rounds, AM8303
List: $1,500.00 (Save $57.01)
$1,442.99
$0.64/Round
Winchester Lake City 5.56 MM M855 FMJ WIN 62 GR 50 Green Tip 50-20RD Box 1000 rds tot, WM855K Case
Winchester Lake City 5.56 MM M855 FMJ WIN 62 GR 50 Green Tip 50-20RD Box 1000 rds tot, WM855K Case
List: $869.99 (Save 10%)
$782.99
$0.78/Round
Magtech 5.56x45mm NATO 55 Grain Full Metal Jacket Brass Cased Rifle Ammo, 1000 Rounds, 556ACS
Magtech 5.56x45mm NATO 55 Grain Full Metal Jacket Brass Cased Rifle Ammo, 1000 Rounds, 556ACS
List: $732.00 (Save $31.51)
$700.49
$0.70/Round
PMC Ammunition X-Tac 5.56x45mm NATO 55 Grain Full Metal Jacket Rifle Ammo, Metal Box, 840 Rounds, 1102741
PMC Ammunition X-Tac 5.56x45mm NATO 55 Grain Full Metal Jacket Rifle Ammo, Metal Box, 840 Rounds, 1102741
List: $632.49 (Save 10%)
$571.49
$0.68/Each
PMC Ammunition X-Tac 5.56x45mm NATO 62 Grain Full Metal Jacket Boat Tail Rifle Ammo, Metal Box, 840 Rounds, 1102742
PMC Ammunition X-Tac 5.56x45mm NATO 62 Grain Full Metal Jacket Boat Tail Rifle Ammo, Metal Box, 840 Rounds, 1102742
List: $650.49 (Save $48.50)
$601.99
$0.72/Each
Next

Ammo Boxes

1–6 / 6
Previous
Berrys 29682 405 Ammo Box 223 Rem,5.56x45mm NATO 50rd Smoke Lid W/Black Bottom
Berrys 29682 405 Ammo Box 223 Rem,5.56x45mm NATO 50rd Smoke Lid W/Black Bottom
(1)
List: $6.99 (Save 50%)
$3.49
Berrys 44661 405 Ammo Box 223 Rem,5.56x45mm NATO 50rd Blue Lid W/Black Bottom
Berrys 44661 405 Ammo Box 223 Rem,5.56x45mm NATO 50rd Blue Lid W/Black Bottom
List: $6.99 (Save 50%)
$3.49
Berrys 86410 005 Ammo Box 223 Rem,5.56x45mm NATO 100rd Blue Lid W/Black Bottom
Berrys 86410 005 Ammo Box 223 Rem,5.56x45mm NATO 100rd Blue Lid W/Black Bottom
List: $6.99 (Save 21%)
$5.49
Berrys 79462 405 Ammo Box 223 Rem,5.56x45mm NATO 50rd Clear Lid W/Black Bottom
Berrys 79462 405 Ammo Box 223 Rem,5.56x45mm NATO 50rd Clear Lid W/Black Bottom
List: $6.99 (Save 50%)
$3.49
MTM Ammo Rack w 4 RS-50-24 Ammo boxes, Dark Earth/Clear Blue, ARRS
MTM Ammo Rack w 4 RS-50-24 Ammo boxes, Dark Earth/Clear Blue, ARRS
(2)
$43.19
Berrys 11664 005 Ammo Box 223 Rem,5.56x45mm NATO 100rd Smoke Lid W/Black Bottom
Berrys 11664 005 Ammo Box 223 Rem,5.56x45mm NATO 100rd Smoke Lid W/Black Bottom
List: $6.99 (Save 21%)
$5.49
Next

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Radical Firearms Complete Billet Side Charging Upper Assembly 7.5in 5.56 M4 Contour w/ A2 Flash Hider Unavailable & Discontinued Models

List of Unorderable Models

  • Radical Firearms Complete Billet Side Charging Upper Assembly 7.5in 5.56 M4 Contour, 1/7 Twist, 7in FCR, M-LOK, A2 Flash Hider, Black, CBU7.5-5.56M4-7FCR , MPN: CBU7.5-5.56M4-7FCR , UPC: 816903028054 , Code: 2CS-UFH-56M4CUAF75-CBU7-5-5-56M4-7FCR
  • Radical Firearms Complete Billet Side Charging Upper Assembly 7.5in 5.56 M4 Contour, 1/7 Twist, 7in FGS, MOE, A2 Flash Hider, Black, CBU7.5-5.56M4-7FGS , MPN: CBU7.5-5.56M4-7FGS , UPC: 816903028061 , Code: 2CS-UFH-56M4CUAF75-CBU7-5-5-56M4-7FGS
  • Radical Firearms Complete Billet Side Charging Upper Assembly 7.5in 5.56 M4 Contour, 1/7 Twist, 7in FQR, QUAD PICATINNY, A2 Flash Hider, Black, CBU7.5-5.56M4-7FQR , MPN: CBU7.5-5.56M4-7FQR , UPC: 816903028078 , Code: 2CS-UFH-56M4CUAF75-CBU7-5-5-56M4-7FQR
  • Radical Firearms Complete Billet Side Charging Upper Assembly 7.5in 5.56 M4 Contour, 1/7 Twist, 7in MHR, M-LOK, A2 Flash Hider, Black, CBU7.5-5.56M4-7MHR , MPN: CBU7.5-5.56M4-7MHR , UPC: 816903028092 , Code: 2CS-UFH-56M4CUAF75-CBU7-5-5-56M4-7MHR
  • Radical Firearms Complete Billet Side Charging Upper Assembly 7.5in 5.56 M4 Contour, 1/7 Twist, 7in FTR, KEYMOD, A2 Flash Hider, Black, CBU7.5-5.56M4-7FTR , MPN: CBU7.5-5.56M4-7FTR , UPC: 816903028115 , Code: 2CS-UFH-56M4CUAF75-CBU7-5-5-56M4-7FTR
  • Radical Firearms Complete Billet Side Charging Upper Assembly 7.5in 5.56 M4 Contour, 1/7 Twist, 7in RPR, M-LOK, A2 Flash Hider, Black, CBU7.5-5.56M4-7RPR , MPN: CBU7.5-5.56M4-7RPR , Code: 2CS-UFH-56M4CUAF75-CBU7-5-5-56M4-7RPR
  • Radical Firearms Complete Billet Side Charging Upper Assembly 7.5in 5.56 M4 Contour, 1/7 Twist, 7in FHR, KEYMOD, A2 Flash Hider, Black, CBU7.5-5.56M4-7FHR , MPN: CBU7.5-5.56M4-7FHR , UPC: 816903028085 , Code: 2CS-UFH-56M4CUAF75-CBU7-5-5-56M4-7FHR
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Last updated 2026-09-28 UTC.