.300 Blackout
.300 Blackout
Discover an extensive range of top-tier .300 Blackout AR 15 parts and accessories designed to elevate your shooting experience. Our collection offers exceptional quality and compatibility, from high-performance barrels and muzzle devices to precision triggers and handguards. Whether seeking enhanced accuracy, reduced recoil, or tactical versatility, our meticulously curated selection ensures you'll find the perfect components to optimize your .300 Blackout AR 15. Elevate your shooting performance and unlock the full potential of your firearm with our premium offerings.
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10.5" .300BLK 1:8 Black Nitride Pistol Barrel
Black Rifle Depot
MSRP: $89.95$84.9510.5" .300BLK 1:8 Black Nitride Pistol Barrel Precision-Machined for Performance and Durability Experience the quality and performance of the 10.5" .300 BLK Pistol Barrel, manufactured under the BRD brand to deliver exceptional value without sacrificing...MSRP: $89.95$84.95 -
Out of stock
10.5" 300 BLK 1:7 Twist Phosphate Pistol Heavy Barrel
Black Rifle Depot
MSRP: $89.95$79.9510.5" 300 BLK 1:7 Twist Phosphate Pistol Heavy Barrel Elevate your AR-15 pistol build with the BRD 10.5" 300 BLK 1:7 Twist Heavy Barrel, crafted to deliver superior performance, durability, and precision at a budget-friendly price. At Black Rifle Depot,...MSRP: $89.95$79.95 -
Out of stock
Aero Precicion M4E1 Threaded Complete Upper 8" .300 Blackout Barrel 7" M-LOK ATLAS S-ONE Handguard - FDE Cerakote
Aero Precision
MSRP: $635.00$569.99Aero Precicion M4E1 Threaded Complete Upper 8" .300 Blackout Barrel 7" M-LOK ATLAS S-ONE Handguard - FDE Cerakote Aero Precision APAR700311M1: This complete upper includes our new ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with...MSRP: $635.00$569.99 -
Out of stock
16" .300 Blackout Barrel
Black Rifle Depot
$139.9516" .300 Blackout Barrel This is a hard to come by barrel. It is also a must have for any serious custom AR builder and collector. Features: Chambered In .300 Blackout 1:10 Twist Black Nitride Treated 4150 CMV Barrel Steel Pistol Length...$139.95 -
Out of stock
ODIN Works 10.5" Pistol .300 BLK Medium Profile Barrel w/ Tunable Gas Block - Black Nitride
Odin Works
MSRP: $285.00$270.95ODIN Works 10.5" Pistol .300 BLK Medium Profile Barrel w/ Tunable Gas Block - Black Nitride Precision and Performance for Your AR-15 Pistol Build The ODIN Works 10.5" Pistol .300 Blackout Medium Profile Barrel is built to deliver peak performance and...MSRP: $285.00$270.95 -
Out of stock
Sons of Liberty Gun Works EXO3 16" .300 BO Upper
Sons of Liberty Gun Works
MSRP: $750.00$749.95Sons of Liberty Gun Works EXO3 16" .300 BO Complete Upper Sons of Liberty Gun Works believes in Quality Mil-Spec or better parts. They believe there is no substitute for quality and that your gun should be built right the first time, ready for hard use...MSRP: $750.00$749.95 -
Out of stock
Maxim Defense Industries 5.5" PDX Complete 300BLK AR 15 Upper
Maxim Defense Industries
MSRP: $1,295.95$1,165.50Maxim Defense Industries 5.5" PDX Complete 300BLK AR 15 Upper The NEW Maxim Defense PDX(TM) U.R.G is built to handle the fierce demands of the Tier 1 community and designed to install on any Mil-Spec lower receiver. With the PDX(TM) U.R.G, you dominate...MSRP: $1,295.95$1,165.50 -
Out of stock
16" 300BLK 1:8 Parkerized Pistol Heavy Barrel
Black Rifle Depot
MSRP: $99.99$79.9516" 300BLK 1:8 Parkerized Pistol Heavy Barrel We collaborate with leading machine shops and barrel manufacturers at Black Rifle Depot to offer exceptional barrels under the BRD brand. By sourcing from top-tier American manufacturers and purchasing in...MSRP: $99.99$79.95 -
Out of stock
CMMG 16.1" 300 AAC Blackout AR 15 Barrel - Stainless
CMMG
$204.95CMMG 16.1" 300 AAC Blackout AR 15 Barrel - Stainless The CMMG 16.1" 300 AAC Blackout AR 15 Barrel is perfect for building your custom AR15 upper group. Comes with properly installed M4 barrel extension. All barrel sub-assemblies are properly head spaced...$204.95 -
5" .300 BLK 1:5 Micro Black Nitride Barrel
Black Rifle Depot
MSRP: $119.95$89.955" .300 BLK 1:5 Micro Black Nitride Barrel Compact Power and Precision The 5" .300 BLK 1:5 Micro Black Nitride Barrel by Black Rifle Depot is engineered for top performance in compact AR builds. Crafted in partnership with trusted American Tier 1...MSRP: $119.95$89.95 -
Out of stock
8.5" 300 Blackout 1:8 Pistol Length Barrel - Parkerized
Black Rifle Depot
MSRP: $99.95$87.958.5" 300 Blackout 1:8 Pistol Length Barrel - Parkerized We take pride in partnering with top-tier machine shops and barrel manufacturers to offer you the best barrels under our BRD brand. When we identify a barrel maker that meets our high standards, we...MSRP: $99.95$87.95 -
Out of stock
8.5" 300 Blackout Parkerized Heavy Barrel, 1:8 Pistol Length
Black Rifle Depot
MSRP: $71.99$64.958.5" 300 Blackout Parkerized Heavy Barrel, 1:8 Pistol Length Precision and Durability in a Compact 300 Blackout Barrel The 8.5" 300 Blackout Parkerized Heavy Barrel is crafted for the AR-15 platform with precision and durability in mind. Featuring a 1:8...MSRP: $71.99$64.95 -
Out of stock
Aero Precision 8" .300 BLK Complete Upper w/ No Forward Assist & M-LOK ATLAS R-ONE Handguard - Black
Aero Precision
MSRP: $434.99$374.95Aero Precision 8" .300 BLK Complete Upper w/ No Forward Assist & M-LOK ATLAS R-ONE Handguard - Black This AR-15 Complete Upper Receiver, paired with the ATLAS R-ONE handguard streamlines the appearance of your next AR-15 build by removing the Forward...MSRP: $434.99$374.95 -
Out of stock
Aero Precision AR15 Complete Upper w/ No Forward Assist, 8" .300 Blackout Barrel, 7" M-LOK ATLAS S-ONE Handguard - Anodized Black
Aero Precision
MSRP: $434.99$426.95Aero Precision AR15 Complete Upper w/ No Forward Assist, 8" .300 Blackout Barrel, 7" M-LOK ATLAS S-ONE Handguard - Anodized Black This AR15 Complete Upper Receiver, paired with the ATLAS S-ONE handguard streamlines the appearance of your next AR15 build...MSRP: $434.99$426.95 -
Out of stock
Aero Precision M4E1 Complete Upper 8" .300 Blackout Barrel EM-7 Gen 2 Handguard - Anodized Black
Aero Precision
MSRP: $595.00$516.95Aero Precision M4E1 Complete Upper 8" .300 Blackout Barrel EM-7 Gen 2 Handguard - Anodized Black This Complete Upper includes our Gen 2 Enhanced Handguard! Key features include the addition of quick disconnect sling sockets, enhanced milling design...MSRP: $595.00$516.95 -
Out of stock
Aero Precision M4E1 Threaded Complete Upper 10" .300 Blackout Barrel ATLAS R-ONE 9" M-LOK HG - FDE Cerakote
Aero Precision
MSRP: $655.00$569.95Aero Precision M4E1 Threaded Complete Upper 10" .300 Blackout Barrel ATLAS R-ONE 9" M-LOK HG - FDE Cerakote This complete upper includes Aero Precision's new ATLAS R-ONE Handguard! The R-ONE handguards are designed with size and weight in mind, while...MSRP: $655.00$569.95 -
Aero Precision M4E1-T Complete Upper, 16" .300 Blackout Barrel, 12" M-LOK ATLAS S-ONE HG - Anodized Black
Aero Precision
MSRP: $550.00$504.95Aero Precision M4E1-T Complete Upper, 16" .300 Blackout Barrel, 12" M-LOK ATLAS S-ONE HG - Anodized Black This complete upper includes our new ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing the...MSRP: $550.00$504.95 -
Out of stock
Aero Precision M4E1-T Complete Upper, 16" .300 Blackout Barrel, 15" M-LOK ATLAS S-ONE HG - Anodized Black
Aero Precision
MSRP: $660.00$573.95Aero Precision M4E1-T Complete Upper, 16" .300 Blackout Barrel, 15" M-LOK ATLAS S-ONE HG - Anodized Black This AERO Precision Complete Upper is equipped with the new ATLAS S-ONE Handguard, part of our S-ONE line that emphasizes size reduction and weight...MSRP: $660.00$573.95 -
Aero Precision M4E1-T Complete Upper, 8" .300 Blackout Barrel, 7" M-LOK ATLAS S-ONE HG, Anodized Black
Aero Precision
MSRP: $595.00$516.95Aero Precision M4E1-T Complete Upper, 8" .300 Blackout Barrel, 7" M-LOK ATLAS S-ONE HG, Anodized Black This complete upper includes our new ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing the...MSRP: $595.00$516.95 -
Out of stock
Aero PrecisionM4E1 Threaded Complete Upper 8" .300 Blackout Barrel ATLAS R-ONE 7" M-LOK HG - FDE Cerakote
Aero Precision
MSRP: $635.00$541.95Aero Precision M4E1 Threaded Complete Upper 8" .300 Blackout Barrel ATLAS R-ONE 7" M-LOK HG - FDE Cerakote The Aero Precision M4E1 Threaded Complete Upper features the innovative ATLAS R-ONE Handguard. Designed to focus on reducing size and...MSRP: $635.00$541.95 -
Out of stock
Criterion Barrels 10.5" .300BLK Hybrid Nitride Pistol Length Barrel
Criterion Barrels
MSRP: $279.99$250.95Criterion Barrels 10.5" .300BLK Hybrid Nitride Pistol Length Barrel Optimized for Suppressed and Unsuppressed Fire with Superior Heat Absorption and Balance. The Criterion Barrels 10.5" .300 BLK Hybrid Nitride Pistol Length Barrel is engineered to...MSRP: $279.99$250.95 -
Out of stock
E-Lander .300 Blackout 10-Round Steel AR-15 Magazine
E-Lander
MSRP: $24.45$21.65E-Lander .300 Blackout 10-Round Steel AR-15 Magazine E-Lander mags are high performance durable steel magazines. Made for common sidearms, These magazines were tested by special military forces and anti-terror units and have proven to withstand extreme...MSRP: $24.45$21.65 -
Out of stock
Faxon Match Series 7.5" GUNNER 300 BLK Pistol 1-5 416-R Stainless Nickel PVD 5R Nickel Teflon Extension Barrel
Faxon Firearms
MSRP: $199.95$189.95Faxon Match Series 7.5" GUNNER 300 BLK Pistol 1-5 416-R Stainless Nickel PVD 5R Nickel Teflon Extension Barrel A faster 1:5 Twist Rate combined with the Lightweight Faxon Gunner Profile. The 300 Blackout cartridge yields increased performance in shorter...MSRP: $199.95$189.95 -
Out of stock
Maxim Defense Industries 5.5" PDX Complete 300BLK AR 15 Upper - FDE
Maxim Defense Industries
MSRP: $1,295.00$1,284.95Maxim Defense Industries 5.5" PDX Complete 300BLK AR 15 Upper - FDE The NEW Maxim Defense PDX(TM) U.R.G is built to handle the fierce demands of the Tier 1 community and designed to install on any Mil-Spec lower receiver. With the PDX(TM) U.R.G, you...MSRP: $1,295.00$1,284.95 -
Out of stock
Odin Works 10.5" Pistol .300 BLK Medium Profile Barrel w/ Tunable Gas Block
Odin Works
MSRP: $270.00$256.95Odin Works 10.5" Pistol .300 BLK Medium Profile Barrel w/ Tunable Gas Block Compact and Versatile .300 BLK Performance Unlock the full potential of your AR-15 build with the ODIN Works 10.5" .300 AAC Blackout Barrel. Crafted from high-grade 416R...MSRP: $270.00$256.95 -
Out of stock
Odin Works 16.1" Carbine .300 BLK Medium Profile Barrel w/ Tunable Gas Block
Odin Works
MSRP: $330.00$313.95Odin Works 16.1" Carbine .300 BLK Medium Profile Barrel w/ Tunable Gas Block Precision-Optimized for Supersonic and Subsonic .300 BLK Rounds Experience the flexibility and power of the ODIN Works 16.1" Carbine .300 AAC Blackout Barrel. Engineered from...MSRP: $330.00$313.95 -
Out of stock
Odin Works 16.1" Pistol .300 BLK Medium Profile Barrel w/ Tunable Gas Block and Gas Tube
Odin Works
MSRP: $330.00$313.95Odin Works 16.1" Pistol .300 BLK Medium Profile Barrel w/ Tunable Gas Block and Gas Tube Flexible and Precision-Tuned for .300 AAC Blackout Performance Maximize your AR-15’s potential with the ODIN Works 16.1" .300 BLK Medium Profile Barrel...MSRP: $330.00$313.95 -
Out of stock
Radical Firearms 10.5" 300 Black Out Complete Upper Assembly
Radical Firearms
MSRP: $474.95$449.95Radical Firearms 10.5" 300 Black Out Complete Upper Assembly The Radical Firearms 10.5" HBAR profile 300BLK is a complete MIL-STD upper ready to drop on any MIL-STD lower Receiver. Perfect for the novice or advanced shooter wanting to finish out that...MSRP: $474.95$449.95 -
Out of stock
Rosco Manufacturing Purebred 8.2" 300 BLK Heavy 1:7 Twist Pistol Stainless Barrel
Rosco Manufacturing
MSRP: $188.00$174.95Rosco Manufacturing Purebred 8.2" 300 BLK Heavy 1:7 Twist Pistol Stainless Barrel Purebred 8.2" 300 Blackout Barrel: This Rosco Purebred 8.2" 300 Blackout Barrel was designed for SBR/ Pistol use in conjunction with suppressors. This is the shortest that...MSRP: $188.00$174.95 -
Out of stock
Sons of Liberty Gun Works 16" M4-89 Upper
Sons of Liberty Gun Works
MSRP: $900.00$889.95Sons of Liberty Gun Works 16" M4-89 Upper 300 Blackout Elevate your firearm experience with the Sons of Liberty Gun Works M4-89 Complete Upper. Constructed with an unwavering commitment to excellence, SOLGW upholds quality, durability, and combat...MSRP: $900.00$889.95 -
Out of stock
Sons Of Liberty Gun Works Combat Grade .300 BLK Pistol Barrel - 9"
Sons of Liberty Gun Works
MSRP: $199.00$189.959" Combat Grade .300 BLK Pistol Barrel Exceptional Durability and Precision in a Compact Size The Sons Of Liberty Gun Works Combat Grade 9" .300 Blackout Pistol Barrel is designed to deliver superior performance and reliability in compact AR builds...MSRP: $199.00$189.95 -
Out of stock
Wilson Combat 8" .300 BLK SBR Stainless Pistol Barrel
Wilson Combat
$229.95Wilson Combat 8" .300 BLK SBR Stainless Pistol Barrel All Wilson Combat Match Grade AR-15 barrels are precisely crafted of the finest American-made 416R rifle rated steel on computer controlled equipment to our exacting list of technical specifications...$229.95