Brownells194200176
Brownells Ar-15 A2 Barrel Group 20'' 1-7 Twist, Rifle Gas$299.99
Availability: In Stock
Current Stock: Out of stock
The Del-Ton AR-15 Heavy Rifle Kit with 20" barrel and 1:9 twist is a complete upper assembly solution for builders who want a quality, mid-length gas system rifle without piecing together components from different sources. This kit arrives head-spaced and test-fired, ready to mate with a lower receiver (sold separately) and get to the range. It's built on mil-spec dimensions throughout, making it compatible with standard AR platforms and parts ecosystems.
The 20" heavy profile barrel is chrome moly vanadium with M4 feed ramps, chambered in 5.56 NATO, and topped with an A2 flash hider. That heavier profile means less whip and better harmonics for precision work—whether you're dialing in loads at 100 yards or stretching shots downrange. The 1:9 twist stabilizes a wide range of bullet weights, from 55-grain varmint rounds through 62-grain military-spec loads. Phosphate finish on the barrel sheds corrosion and doesn't require constant babying.
Inside, you get a bolt carrier group with a carpenter 158 bolt (HPT/MPI tested), phosphated 8620 steel carrier with mil-spec chrome lining, and a properly staked gas key. The upper is forged 7075 T6 aluminum with hard coat anodizing, A3 flat-top configuration, ejection port cover, and round forward assist. Standard rifle-length handguards with delta ring and heat shield keep your hands comfortable and your setup predictable. The kit includes a standard A2 buttstock with trapdoor assembly, so you'll have a complete rifle once you add a lower receiver and magazines.
This is a no-frills, proven platform: straightforward, reliable, and ready to work whether you're building your first AR or adding another upper to your safe.
| Barrel Length | 20" |
| Barrel Profile | Heavy |
| Barrel Material | Chrome Moly Vanadium |
| Twist Rate | 1:9 |
| Chamber | 5.56 NATO |
| Gas System | Standard (Rifle) Length |
| Muzzle Device | A2 Flash Hider |
| Upper Receiver | Forged 7075 T6 Aluminum, A3 Flat-Top |
| Upper Finish | Hard Coat Anodized |
| Bolt Material | Carpenter 158 Steel |
| Bolt Testing | HPT/MPI Tested |
| Carrier Group | Phosphated 8620 Steel with Mil-Spec Chrome Lining |
| Handguards | Standard (Rifle) Length Aluminum with Delta Ring and Heat Shield |
| Buttstock | Standard A2 with Reinforced Zytel and Trapdoor |
| Ejection Port | Mil-Spec with Cover |
| Forward Assist | Round |
| Included | Upper Assembly, Bolt Carrier Group, Handguards, Buttstock, Lower Parts Kit |
| Not Included | Lower Receiver, Magazines |
You'll need an AR-15 lower receiver (which is the regulated part in the US) and magazines. This kit includes the complete upper assembly, bolt carrier group, handguards, buttstock, and lower parts kit, so once you add the lower receiver and mags, you have a complete rifle.
The 20" heavy profile barrel is a solid choice for precision work. The heavier profile reduces barrel whip and supports more consistent harmonics, and the 1:9 twist is versatile across a wide range of .223/5.56 ammunition weights. That said, a flat-top upper with A2 buttstock is a general-purpose platform; dedicated match rifles often use different ergonomics.
The 1:9 twist is designed to handle the common range of 5.56 NATO and .223 Remington loads, including 55-grain varmint rounds through 62-grain military-spec ammunition. It's one of the most versatile twist rates for the cartridge.
Yes. The upper is mil-spec and will work with any standard AR-15 lower receiver. The A3 flat-top configuration accepts Picatinny rail optic mounts, and the rifle-length handguard with delta ring is compatible with standard furniture and rails designed for that platform.
SKU: 200191389 • Width: 9.5in • Height: 4in • Depth: 35.75in • Weight: 9.77oz
Availability: In Stock
Current Stock: Out of stock
The Del-Ton AR-15 Heavy Rifle Kit with 20" barrel and 1:9 twist is a complete upper assembly solution for builders who want a quality, mid-length gas system rifle without piecing together components from different sources. This kit arrives head-spaced and test-fired, ready to mate with a lower receiver (sold separately) and get to the range. It's built on mil-spec dimensions throughout, making it compatible with standard AR platforms and parts ecosystems.
The 20" heavy profile barrel is chrome moly vanadium with M4 feed ramps, chambered in 5.56 NATO, and topped with an A2 flash hider. That heavier profile means less whip and better harmonics for precision work—whether you're dialing in loads at 100 yards or stretching shots downrange. The 1:9 twist stabilizes a wide range of bullet weights, from 55-grain varmint rounds through 62-grain military-spec loads. Phosphate finish on the barrel sheds corrosion and doesn't require constant babying.
Inside, you get a bolt carrier group with a carpenter 158 bolt (HPT/MPI tested), phosphated 8620 steel carrier with mil-spec chrome lining, and a properly staked gas key. The upper is forged 7075 T6 aluminum with hard coat anodizing, A3 flat-top configuration, ejection port cover, and round forward assist. Standard rifle-length handguards with delta ring and heat shield keep your hands comfortable and your setup predictable. The kit includes a standard A2 buttstock with trapdoor assembly, so you'll have a complete rifle once you add a lower receiver and magazines.
This is a no-frills, proven platform: straightforward, reliable, and ready to work whether you're building your first AR or adding another upper to your safe.
| Barrel Length | 20" |
| Barrel Profile | Heavy |
| Barrel Material | Chrome Moly Vanadium |
| Twist Rate | 1:9 |
| Chamber | 5.56 NATO |
| Gas System | Standard (Rifle) Length |
| Muzzle Device | A2 Flash Hider |
| Upper Receiver | Forged 7075 T6 Aluminum, A3 Flat-Top |
| Upper Finish | Hard Coat Anodized |
| Bolt Material | Carpenter 158 Steel |
| Bolt Testing | HPT/MPI Tested |
| Carrier Group | Phosphated 8620 Steel with Mil-Spec Chrome Lining |
| Handguards | Standard (Rifle) Length Aluminum with Delta Ring and Heat Shield |
| Buttstock | Standard A2 with Reinforced Zytel and Trapdoor |
| Ejection Port | Mil-Spec with Cover |
| Forward Assist | Round |
| Included | Upper Assembly, Bolt Carrier Group, Handguards, Buttstock, Lower Parts Kit |
| Not Included | Lower Receiver, Magazines |
You'll need an AR-15 lower receiver (which is the regulated part in the US) and magazines. This kit includes the complete upper assembly, bolt carrier group, handguards, buttstock, and lower parts kit, so once you add the lower receiver and mags, you have a complete rifle.
The 20" heavy profile barrel is a solid choice for precision work. The heavier profile reduces barrel whip and supports more consistent harmonics, and the 1:9 twist is versatile across a wide range of .223/5.56 ammunition weights. That said, a flat-top upper with A2 buttstock is a general-purpose platform; dedicated match rifles often use different ergonomics.
The 1:9 twist is designed to handle the common range of 5.56 NATO and .223 Remington loads, including 55-grain varmint rounds through 62-grain military-spec ammunition. It's one of the most versatile twist rates for the cartridge.
Yes. The upper is mil-spec and will work with any standard AR-15 lower receiver. The A3 flat-top configuration accepts Picatinny rail optic mounts, and the rifle-length handguard with delta ring is compatible with standard furniture and rails designed for that platform.
SKU: 200191389 • Width: 9.5in • Height: 4in • Depth: 35.75in • Weight: 9.77oz