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Rock River Arms .223 Wylde Left Handed A4 Completed Upper LH0450B

Rock River Arms Completed Upper Receiver, Left Handed A4 .223/5.56mm, 20 Inch Barrel, 1-9 Twist, 1/2-28 Thread, A2 Handguard, A2 Flash Hider, Black, LH0450B
Rock River Arms Completed Upper Receiver, Left Handed A4 .223/5.56mm, 20 Inch Barrel, 1-9 Twist, 1/2-28 Thread, A2 Handguard, A2 Flash Hider, Black, LH0450B
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Rock River Arms Completed Upper Receiver, Left Handed A4 .223/5.56mm, 20 Inch Barrel, 1-9 Twist, 1/2-28 Thread, A2 Handguard, A2 Flash Hider, Black, LH0450B

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Questions & Answers

Product Discontinued by Manufacturer

Rock River Arms .223 Wylde Left Handed A4 Completed Upper has been discontinued by Rock River Arms 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!

Product Info for Rock River Arms .223 Wylde Left Handed A4 Completed Upper

the .223 Wylde chamber was designed as a match chambering for semi-automatic rifles. It will accomodate both .223 Rem and 5.56mm NATO ammunition. It is relieved in the case body to aid in extraction and features a shorter throat for improved accuracy.image

Package Contents:

  • Rock River Arms .223 Wylde Left Handed A4 Completed Upper
  • Bolt Carrier Group
  • Charging Handle Assembly

Ammunition

1–39 / 39
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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)
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$1.03/Round
20% Coupon
Hornady BLACK 5.56x45mm NATO 75 Grain InterLock HD SBR Centerfire Rifle Ammunition
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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: $612.29 (Save 13%)
$533.29
$0.53/Round
Fort Scott Munitions .5.56 NATO 40 Grain CNC Machined Copper Brass Rifle Ammo, 20 Rounds, 556-040-SCV2
Fort Scott Munitions .5.56 NATO 40 Grain CNC Machined Copper Brass Rifle Ammo, 20 Rounds, 556-040-SCV2
List: $28.06 (Save 23%)
$21.69
$1.08/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 23%)
$21.89
$1.09/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: $39.99 (Save 16%)
$33.79
$1.69/Round
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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)
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$38.79
$1.94/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: $38.99 (Save $1.30)
$37.69
$1.88/Round
Atomic Ammunition Atomic Ammo 5.56x45 500 Rounds 62gr. Hornady Fmj Bulk-pack
Atomic Ammunition Atomic Ammo 5.56x45 500 Rounds 62gr. Hornady Fmj Bulk-pack
List: $629.99 (Save 10%)
$568.29
$1.14/Round
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PMC Ammunition X-TAC Light Armor Piercing 5.56x45mm NATO 62 Grain Brass Cased Centerfire Rifle Ammunition
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(112)
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$12.49
$0.62/Round
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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
List: $22.49 (Save 32%)
$15.19
$0.76/Round
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Hornady Frontier 5.56x45mm NATO 55 Grain Full Metal Jacket Brass Rifle Ammunition
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Veteran Ammo Defense 5.56x45mm NATO 62 Grain Hollow Point Centerfire Pistol Ammo, 20 Rounds, HMBX-556-24
Veteran Ammo Defense 5.56x45mm NATO 62 Grain Hollow Point Centerfire Pistol Ammo, 20 Rounds, HMBX-556-24
List: $49.99 (Save 24%)
$38.09
$1.90/Round
20% Coupon
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
(28)
As Low As (Save Up to 21%)
$17.09
$0.85/Round
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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
(64)
List: $15.99 (Save 31%)
$10.99
$0.55/Round
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Winchester USA 5.56x45mm NATO 55 grain Ball (M193) Full Metal Jacket Brass Centerfire Rifle Ammunition
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(147)
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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
(1)
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$29.39
$0.58 - $0.59/Round
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Veteran Ammo Defense 5.56x45mm NATO 62 Grain Full Metal Jacket Centerfire Pistol Ammo, 20 Rounds, HMBX-556-25
Veteran Ammo Defense 5.56x45mm NATO 62 Grain Full Metal Jacket Centerfire Pistol Ammo, 20 Rounds, HMBX-556-25
List: $49.99 (Save 23%)
$38.69
$1.93/Round
Best Rated
Winchester USA 5.56x45mm NATO 62 grain Green Tip M855 Full Metal Jacket Boat Tail FMJBT Brass Centerfire Rifle Ammunition
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(132)
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$13.79
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Hornady Frontier 5.56x45mm NATO 68 grain Boat-Tail Hollow Point Brass Cased Centerfire Rifle Ammo, 20 Rounds, FR310
(14)
List: $19.60 (Save 21%)
$15.49
$0.77/Round
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)
List: $128.25 (Save 21%)
$101.79
$0.68/Round
See all 1 models
Newly Added
Federal 5.56x45mm 55 Grain FMJ Brass Rifle Ammunition
Federal 5.56x45mm 55 Grain FMJ Brass Rifle Ammunition
As Low As (Save Up to $8.66)
$70.99
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(14)
List: $40.99 (Save $1.20)
$39.79
$1.99/Round
Magtech 5.56X45 M193 55 Grain Full Metal Jacket Brass Cased Rifle Ammo, 50 Rounds, 556A
Magtech 5.56X45 M193 55 Grain Full Metal Jacket Brass Cased Rifle Ammo, 50 Rounds, 556A
(1)
List: $32.79 (Save $3.10)
$29.69
$0.59/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: $155.00 (Save $12.71)
$142.29
$0.71/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
List: $131.99 (Save 32%)
$89.89
$0.75/Round
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Barnes Precision 5.56x45mm NATO 85 grain Burner Open Tip Match Boat Tail Centerfire Rifle Ammo, 20 Rounds, *30848
Barnes Precision 5.56x45mm NATO 85 grain Burner Open Tip Match Boat Tail Centerfire Rifle Ammo, 20 Rounds, *30848
(5)
List: $39.99 (Save $1.20)
$38.79
$1.94/Round
Magtech 5.56x45mm Ball M193 - 556ACS
Magtech 5.56x45mm Ball M193 - 556ACS
List: $732.00 (Save 13%)
$635.39
$0.64/Round
Aguila 5.56mm NATO 55 grain Full Metal Jacket Rifle Ammo, 30 Rounds, 1E556155
Aguila 5.56mm NATO 55 grain Full Metal Jacket Rifle Ammo, 30 Rounds, 1E556155
(19)
List: $19.19
$18.59
$0.62/Round
Aguila Ammunition 5.56 NATO 62 Grain Full Metal Jacket Boat Tail, Brass Case, Rifle Ammo, 50 Rounds, 1E556110
Aguila Ammunition 5.56 NATO 62 Grain Full Metal Jacket Boat Tail, Brass Case, Rifle Ammo, 50 Rounds, 1E556110
(1)
List: $32.09 (Save $1.10)
$30.99
$0.62/Round
Aguila Ammunition 5.56 NATO 55 Grain Full Metal Jacket Boat Tail, Brass Case, Rifle Ammo, 300 Rounds, 1E556126
Aguila Ammunition 5.56 NATO 55 Grain Full Metal Jacket Boat Tail, Brass Case, Rifle Ammo, 300 Rounds, 1E556126
List: $192.59 (Save $6.40)
$186.19
$0.62/Round
Fort Scott Munitions 5.56 NATO Copper 62 Grain Centerfire Rifle Ammo, 20 Rounds, 556-062-SCV1
Fort Scott Munitions 5.56 NATO Copper 62 Grain Centerfire Rifle Ammo, 20 Rounds, 556-062-SCV1
(2)
List: $47.99 (Save 37%)
$30.09
$1.50/Round
Fiocchi Range Dynamics 556 NATO 55 Grain FMJ Brass Rifle Ammo, 50 Round, 556M193L
Fiocchi Range Dynamics 556 NATO 55 Grain FMJ Brass Rifle Ammo, 50 Round, 556M193L
(2)
List: $40.99 (Save 11%)
$36.59
$0.73/Round
Hornady Frontier 5.56x45mm NATO 62 grain Full Metal Jacket Brass Cased Centerfire Rifle Ammo, 20 Rounds, FR260
Hornady Frontier 5.56x45mm NATO 62 grain Full Metal Jacket Brass Cased Centerfire Rifle Ammo, 20 Rounds, FR260
(2)
List: $17.60 (Save 21%)
$13.99
$0.70/Round
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 21%)
$32.89
$1.64/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 21%)
$36.99
$1.85/Round
PPU PPRM5561M 5.56X45 55 FMJBT RNGMSTR
PPU PPRM5561M 5.56X45 55 FMJBT RNGMSTR
List: $830.99 (Save $76.10)
$754.89
$0.75/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%)
$787.29
$0.79/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 $49.50)
$582.99
$0.69/Each
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Ammo Boxes

1–5 / 5
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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)
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$3.19
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
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: $6.49 (Save 51%)
$3.19
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)
List: $37.97 (Save $3.18)
$34.79
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
Next

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Rock River Arms .223 Wylde Left Handed A4 Completed Upper Unavailable & Discontinued Models

List of Unorderable Models

  • Rock River Arms Completed Upper Receiver, Left Handed A4 .223/5.56mm, 20 Inch Barrel, 1-9 Twist, 1/2-28 Thread, A2 Handguard, A2 Flash Hider, Black, LH0450B , MPN: LH0450B , UPC: 842834109777 , Code: 1WN-URC-UP01-LH0450B
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