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Battle Arms Development BATTLEARMS 4150CM Steel .300 BLK Barrel

Battle Arms Development BATTLEARMS Barrel, .300 BLK, Pistol Gas, 4150CM Steel, 5R Rifling, QPQ Nitride, 7.5 inch, Black Nitride
Battle Arms Development BATTLEARMS Barrel, .300 BLK, Carbine Gas, 4150CM Steel, 5R Rifling, QPQ Nitride, 16 inch, Black Nitride
Battle Arms Development BATTLEARMS Barrel, .300 BLK, Pistol Gas, 4150CM Steel, 5R Rifling, QPQ Nitride, 7.5 inch, Black Nitride
1 of 2 images
Battle Arms Development BATTLEARMS Barrel, .300 BLK, Pistol Gas, 4150CM Steel, 5R Rifling, QPQ Nitride, 7.5 inch, Black Nitride
Battle Arms Development BATTLEARMS Barrel, .300 BLK, Carbine Gas, 4150CM Steel, 5R Rifling, QPQ Nitride, 16 inch, Black Nitride
2 of 2 images
Battle Arms Development BATTLEARMS Barrel, .300 BLK, Carbine Gas, 4150CM Steel, 5R Rifling, QPQ Nitride, 16 inch, Black Nitride

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Questions & Answers

Product Discontinued by Manufacturer

Battle Arms Development BATTLEARMS 4150CM Steel .300 BLK Barrel has been discontinued by Battle Arms Development 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, Rifle Barrels, AR15 Barrels yourself to try and find the perfect replacement for you!

Product Info for Battle Arms Development BATTLEARMS 4150CM Steel .300 BLK Barrel

BATTLEARMS 300BLK BARREL, 5R RIFLING, 4150CM, QPQ NITRIDEimage

MATERIAL 4150 CHROME MOLLY STEEL

INSPECTION MAGNETIC PARTICLE INSPECTED

RIFLING5R RIFLING

FINISH SALT BATH QPQ NITRIDE (INSIDE & OUTSIDE)

CALIBER 300BLK AAC

CROWN 11 DEG TARGET CROWN

TWIST RATE 18 RH TWIST

LENGTHS 16in, 10.5in, 7.5in

GAS SYSTEM 16in CARBINE LENGTH, 10.5 and 7.5 PISTOL LENGTH

MUZZLE THREAD 5/8-24;

GAS BLOCK DIAMETER .750in

GAS BLOCK JOURNAL LENGTH 1.1in

GAS PORT DIAMETER 16in .119in, 10.5in .080, 7.5in .080

BARREL EXTENSION M4

WEIGHT 16in 1 lb 12.7oz, 10.5in 1 lb 3.6oz, 7.5in 15.3oz

HEAT TREATDOUBLE HEAT TREAT STRESS RELIEVED

MULTI-POINT QUALITY CONTROL INSPECTION

made in specialized factories

ALL NFA RULES APPLY

Notes (1.) Gas Block and Gas Tube not included. (2.) Gas Port Diameter may need to be opened up pending on final weapon configuration in super/sub sonic, suppressed/unsuppressed, mil-spec carbine buffer/VERT buffer system, ammunition type, etc.

Package Contents:

  • Battle Arms Development BATTLEARMS 4150CM Steel .300 BLK Barrel

Ammunition

1–39 / 39
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Freedom Munitions .300 Blackout 125 Grain Full Metal Jacket Brass Rifle Ammo, 50 Rounds, FM300F125N50
Freedom Munitions .300 Blackout 125 Grain Full Metal Jacket Brass Rifle Ammo, 50 Rounds, FM300F125N50
(3)
List: $37.19 (Save 19%)
$29.99
$0.60/Round
On Sale
Freedom Munitions .300 Blackout 147 Grain Full Metal Jacket Brass Rifle Ammunition
Freedom Munitions .300 Blackout 147 Grain Full Metal Jacket Brass Rifle Ammunition
(8)
As Low As (Save Up to 24%)
$28.49
$0.57 - $0.60/Round
See all 3 models
On Sale
Freedom Munitions .300 Blackout 150 Grain Full Metal Jacket Brass Rifle Ammunition
Freedom Munitions .300 Blackout 150 Grain Full Metal Jacket Brass Rifle Ammunition
(4)
As Low As (Save Up to 24%)
$28.99
$0.58 - $0.61/Round
See all 3 models
Super Vel Ammunition 300 Blackout 200 grain Full Metal Jacket Brass Cased Rifle Ammunition
Super Vel Ammunition 300 Blackout 200 grain Full Metal Jacket Brass Cased Rifle Ammunition
As Low As (Save Up to 20%)
$57.99
$1.00 - $1.16/Round
See all 2 models
On Sale
Remington .300 AAC Blackout UMC 220 Grain Open Tip Flat Base Brass Rifle Ammunition
Remington .300 AAC Blackout UMC 220 Grain Open Tip Flat Base Brass Rifle Ammunition
(3)
As Low As (Save Up to 28%)
$246.59
$1.46 - $1.54/Round
See all 2 models
On Sale
Hornady Frontier .300 AAC Blackout 125 Grain Full Metal Jacket Centerfire Rifle Ammunition
Hornady Frontier .300 AAC Blackout 125 Grain Full Metal Jacket Centerfire Rifle Ammunition
(6)
As Low As (Save Up to 34%)
$21.39
$1.07 - $1.41/Round
See all 3 models
Freedom Munitions HUSH Subsonic .300 Blackout 220 Grain HPBT Brass Rifle Ammo, 50 Rounds, FMH300H220N50
Freedom Munitions HUSH Subsonic .300 Blackout 220 Grain HPBT Brass Rifle Ammo, 50 Rounds, FMH300H220N50
(2)
List: $63.19 (Save 19%)
$50.99
$1.02/Round
Super Vel Ammunition 300 Blackout 150 grain Full Metal Jacket Brass Cased Rifle Ammunition
Super Vel Ammunition 300 Blackout 150 grain Full Metal Jacket Brass Cased Rifle Ammunition
As Low As (Save Up to 20%)
$39.49
$0.78 - $0.79/Round
See all 2 models
Best Rated
Armscor Precision Inc USA .300 AAC Blackout 147 Grain Full Metal Jacket Brass Cased Rifle Ammo, 20 Rounds, FAC300AAC-1N-20RD
Armscor Precision Inc USA .300 AAC Blackout 147 Grain Full Metal Jacket Brass Cased Rifle Ammo, 20 Rounds, FAC300AAC-1N-20RD
(15)
List: $23.99 (Save 40%)
$14.49
$0.72/Round
Remington UMC Rifle .300 AAC Blackout 220 Grain Open Tip Flat Base Rifle Ammunition
Remington UMC Rifle .300 AAC Blackout 220 Grain Open Tip Flat Base Rifle Ammunition
(1)
As Low As (Save Up to 10%)
$36.49
$1.82/Round
See all 2 models
Nosler BTA Ballistic Tip Ammunition 300 Blackout 220 Grain Ballistic Tip Round Nose Brass Cased Centerfire Rifle Ammo, 20 Rounds, 61050
Nosler BTA Ballistic Tip Ammunition 300 Blackout 220 Grain Ballistic Tip Round Nose Brass Cased Centerfire Rifle Ammo, 20 Rounds, 61050
List: $48.95 (Save 16%)
$41.19
$2.06/Round
On Sale
SinterFire Reduced Hazard .300 AAC Blackout 110 Grain Frangible Brass Cased Rifle Ammo, 50 Rounds, SF300BLK110RHA
SinterFire Reduced Hazard .300 AAC Blackout 110 Grain Frangible Brass Cased Rifle Ammo, 50 Rounds, SF300BLK110RHA
(3)
List: $50.69 (Save 22%)
$39.69
$0.79/Round
Wilson Combat Hornady V-MAX .300 AAC Blackout 110 Grain Brass Cased Pistol Ammo, 20 Round, A300BLK-110-VMAX-20RD
Wilson Combat Hornady V-MAX .300 AAC Blackout 110 Grain Brass Cased Pistol Ammo, 20 Round, A300BLK-110-VMAX-20RD
(1)
List: $30.95 (Save $1.96)
$28.99
$1.45/Round
Barnes Vor-TxRifle Cartridges, .300 AAC Blackout, TAC-TX Boat Tail , 120 Grain, 20 - Rounds, 30827
Barnes Vor-TxRifle Cartridges, .300 AAC Blackout, TAC-TX Boat Tail , 120 Grain, 20 - Rounds, 30827
(1)
List: $52.99 (Save 12%)
$46.49
$2.32/Round
Wilson Combat Hornady ELD-M .300 AAC Blackout 208 Grain Brass Cased Pistol Ammo, 20 Round, A300BLK-208-ELDM-20RD
Wilson Combat Hornady ELD-M .300 AAC Blackout 208 Grain Brass Cased Pistol Ammo, 20 Round, A300BLK-208-ELDM-20RD
List: $39.95 (Save 14%)
$34.29
$1.71/Round
Best Rated
Hornady BLACK .300 AAC Blackout 208 Grain ELD Brass Cased Rifle Ammo, 20 Rounds, 80891
Hornady BLACK .300 AAC Blackout 208 Grain ELD Brass Cased Rifle Ammo, 20 Rounds, 80891
(8)
List: $42.92 (Save 23%)
$32.99
$1.65/Round
Best Rated
Winchester Deer Season XP .300 AAC Blackout 150 grain Extreme Point Polymer Tip Centerfire Rifle Ammo, 20 Rounds, X300BLKDS
Winchester Deer Season XP .300 AAC Blackout 150 grain Extreme Point Polymer Tip Centerfire Rifle Ammo, 20 Rounds, X300BLKDS
(14)
List: $25.79 (Save $2.20)
$23.59
$1.18/Round
Federal Premium Power-Shok .300 AAC Blackout 150 Grain Soft Point Rifle Ammo, 20 Rounds, 300BLKB
Federal Premium Power-Shok .300 AAC Blackout 150 Grain Soft Point Rifle Ammo, 20 Rounds, 300BLKB
Price After Rebate
$25.28
$1.58/Round
Barnes Precision Match .300 AAC Blackout 220 Grain Jacketed Hollow Point Brass Rifle Ammo, 20 Rounds, BB300BLKM2
Barnes Precision Match .300 AAC Blackout 220 Grain Jacketed Hollow Point Brass Rifle Ammo, 20 Rounds, BB300BLKM2
(1)
List: $48.99 (Save 17%)
$40.49
$2.02/Round
On Sale
Federal Premium Power-Shok Copper .300 AAC Blackout 120 Grain Copper Hollow Point Rifle Ammo, 20 Rounds, 300BLK120LFA
Federal Premium Power-Shok Copper .300 AAC Blackout 120 Grain Copper Hollow Point Rifle Ammo, 20 Rounds, 300BLK120LFA
Price After Rebate
$27.20
$1.70/Round
Best Rated
Barnes Vor-TxRifle Cartridges, .300 AAC Blackout, TAC-TX Flat Base, 110 Grain, 20 - Rounds, 21548
Barnes Vor-TxRifle Cartridges, .300 AAC Blackout, TAC-TX Flat Base, 110 Grain, 20 - Rounds, 21548
(7)
List: $76.69 (Save 30%)
$53.99
$2.70/Round
SinterFire GreenLine .300 AAC Blackout 110 Grain Frangible Brass Rifle Ammo, 50 Rounds, SF300BLK110GL-C
SinterFire GreenLine .300 AAC Blackout 110 Grain Frangible Brass Rifle Ammo, 50 Rounds, SF300BLK110GL-C
(1)
List: $52.79 (Save 21%)
$41.49
$0.83/Round
Fort Scott Munitions 300AAC BLACKOUT 190 Grain Centerfire Rifle Ammo, 20 Rounds, 300-190-SCV1SS
Fort Scott Munitions 300AAC BLACKOUT 190 Grain Centerfire Rifle Ammo, 20 Rounds, 300-190-SCV1SS
(4)
List: $67.48 (Save 39%)
$40.99
$2.05/Round
Nosler Varmageddon .300 AAC Blackout 110 Grain Flat Base Tipped Brass Cased Centerfire Rifle Ammo, 20 Rounds, 40127
Nosler Varmageddon .300 AAC Blackout 110 Grain Flat Base Tipped Brass Cased Centerfire Rifle Ammo, 20 Rounds, 40127
(1)
List: $43.95 (Save $3.96)
$39.99
$2.00/Round
Hornady Ammo Custom, .300 Blackout, 110 Grain, Centerfire Rifle Ammo, CX Polymer Tip, 20 Rounds, 808794
Hornady Ammo Custom, .300 Blackout, 110 Grain, Centerfire Rifle Ammo, CX Polymer Tip, 20 Rounds, 808794
(4)
List: $50.84 (Save 13%)
$43.99
$2.20/Round
Best Rated
Barnes 300 AAC Blackout, 120 Grain, Jacketed Hollow Point/JHP, Brass Cased Centerfire Rifle Ammo, 20 Rounds, 32004
Barnes 300 AAC Blackout, 120 Grain, Jacketed Hollow Point/JHP, Brass Cased Centerfire Rifle Ammo, 20 Rounds, 32004
(6)
List: $29.99 (Save 17%)
$24.99
$1.25/Round
HSM 300BLK4N Match 300 Blackout 220 Gr Hollow Point Boat Tail HPBT
HSM 300BLK4N Match 300 Blackout 220 Gr Hollow Point Boat Tail HPBT
List: $34.99
$34.69
$1.73/Round
Wilson Combat Sierra .300 AAC Blackout 220 Grain Hollow Point Boat Tail Brass Cased Pistol Ammo, 20 Round, A300BLK-220-HPBT-20RD
Wilson Combat Sierra .300 AAC Blackout 220 Grain Hollow Point Boat Tail Brass Cased Pistol Ammo, 20 Round, A300BLK-220-HPBT-20RD
(1)
List: $44.95 (Save 13%)
$39.29
$1.96/Round
Best Rated
Hornady Subsonic .300 AAC Blackout 190 grain Subsonic eXpanding Brass Cased Centerfire Rifle Ammo, 20 Rounds, 80877
Hornady Subsonic .300 AAC Blackout 190 grain Subsonic eXpanding Brass Cased Centerfire Rifle Ammo, 20 Rounds, 80877
(25)
List: $44.80 (Save 12%)
$39.49
$1.97/Round
Veteran Ammo Defense .300 AAC Blackout 110 Grain Hollow Point Centerfire Pistol Ammo, 20 Rounds, HMBX-300-26
Veteran Ammo Defense .300 AAC Blackout 110 Grain Hollow Point Centerfire Pistol Ammo, 20 Rounds, HMBX-300-26
List: $53.49 (Save 22%)
$41.49
$2.07/Round
Best Rated
Winchester Super Suppressed .300 AAC Blackout 200 grain Full Metal Jacket Centerfire Rifle Ammo, 20 Rounds, SUP300BLK
Winchester Super Suppressed .300 AAC Blackout 200 grain Full Metal Jacket Centerfire Rifle Ammo, 20 Rounds, SUP300BLK
(26)
List: $34.99 (Save 40%)
$20.99
$1.05/Round
Veteran Ammo Defense .300 AAC Blackout 200 Grain Hollow Point Centerfire Pistol Ammo, 20 Rounds, HMBX-300-27
Veteran Ammo Defense .300 AAC Blackout 200 Grain Hollow Point Centerfire Pistol Ammo, 20 Rounds, HMBX-300-27
List: $59.99 (Save 18%)
$48.99
$2.45/Round
Best Rated
Sellier & Bellot Subsonic .300 AAC Blackout 200 grain Full Metal Jacket Brass Cased Rifle Ammo, 20 Rounds, SB300BLKSUBA
Sellier & Bellot Subsonic .300 AAC Blackout 200 grain Full Metal Jacket Brass Cased Rifle Ammo, 20 Rounds, SB300BLKSUBA
(13)
List: $19.49 (Save $1.50)
$17.99
$0.90/Round
Barnes Precision Match .300 AAC Blackout 125 grain Match Burner Open Tip Match Boat Tail Centerfire Rifle Ammunition
Barnes Precision Match .300 AAC Blackout 125 grain Match Burner Open Tip Match Boat Tail Centerfire Rifle Ammunition
(1)
As Low As (Save Up to $1.00)
$45.99
$2.30/Round
See all 2 models
Newly Added
Atomic Ammunition Subsonic .300 AAC Blackout 220grain Boat Tail Hollow Point Brass Cased Rifle Ammunition
Atomic Ammunition Subsonic .300 AAC Blackout 220grain Boat Tail Hollow Point Brass Cased Rifle Ammunition
As Low As (Save Up to 14%)
$35.00
$1.70 - $1.75/Round
See all 2 models
SIG SAUER .300 AAC Blackout 220 Grain Match Brass Cased Rifle Ammo, 20 Rounds, C300A2-20
SIG SAUER .300 AAC Blackout 220 Grain Match Brass Cased Rifle Ammo, 20 Rounds, C300A2-20
List: $32.99 (Save $3.00)
$29.99
$1.50/Round
Winchester Usa .300 AAC Blackout 147 Grain Full Metal Jacket Rifle Ammo, 125 Rounds, USA300B1472
Winchester Usa .300 AAC Blackout 147 Grain Full Metal Jacket Rifle Ammo, 125 Rounds, USA300B1472
List: $599.00 (Save 76%)
$142.49
$1.14/Round
Best Rated
Sellier & Bellot eXergy .300 AAC Blackout 110 Grain Full Metal Jacket Brass Cased Rifle Ammo, 20 Rounds, SB300BLKXA
Sellier & Bellot eXergy .300 AAC Blackout 110 Grain Full Metal Jacket Brass Cased Rifle Ammo, 20 Rounds, SB300BLKXA
(6)
List: $28.65 (Save 25%)
$21.49
$1.07/Round
SIG SAUER .300 AAC Blackout 194 Grain Max Expansion Brass Cased Rifle Ammo, 20 Rounds, C300D2-20
SIG SAUER .300 AAC Blackout 194 Grain Max Expansion Brass Cased Rifle Ammo, 20 Rounds, C300D2-20
List: $94.99 (Save 24%)
$71.99
$3.60/Round
Next

Ammo Boxes

1–1 / 1
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Best Rated
MTM Ammo Can Tray for Metal Cans 30 Cal., Dark Earth, MAC30
MTM Ammo Can Tray for Metal Cans 30 Cal., Dark Earth, MAC30
(12)
List: $22.09 (Save 32%)
$14.99
Next

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Battle Arms Development BATTLEARMS 4150CM Steel .300 BLK Barrel Unavailable & Discontinued Models

List of Unorderable Models

  • Battle Arms Development Barrel, 300 BLK, Pistol Gas, 4150CM Steel, 5R Rifling, QPQ Nitride, 7.5 inch, Black Nitride, BAD-BBL7.5T05R1/8BN , MPN: BAD-BBL7.5T750P3005R1/8BN , UPC: 810033780752 , Code: 2OS-ATB-BA300BRL-BAD-BBL7-5T05R1-8BN
  • Battle Arms Development Barrel, 300 BLK, Pistol Gas, 4150CM Steel, 5R Rifling, QPQ Nitride, 10.5 inch, Black Nitride, BAD-BBL10.5T750R1/8BN , MPN: BAD-BBL10.5T750P3005R1/8BN , UPC: 810033780745 , Code: 2OS-ATB-BA300BRL-BAD-BBL10-5T750R1-8BN
  • Battle Arms Development Barrel, 300 BLK, Carbine Gas, 4150CM Steel, 5R Rifling, QPQ Nitride, 16 inch, Black Nitride, BAD-BBL16T7501/8BN , MPN: BAD-BBL16T750P3005R1/8BN , UPC: 810033780738 , Code: 2OS-ATB-BA300BRL-BAD-BBL16T7501-8BN
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Last updated 2026-08-10 UTC.