“M27” inspired 5.56x45mm Barrel for the BRN-4® platform
Not previously available in this configuration, the BRN-4 M27 16.5 inch 5.56x45mm NATO chrome lined barrel features a forward mounted bayonet lug. Manufactured by Faxon for Brownells, these manganese phosphate barrels are machined from 4150 chrome moly steel, and feature a precision buttoned rifle 1-7 twist bore with chrome lined 5.56x45mm NATO chamber.
The bayonet lug attaches after installation of the gas block. The bayonet lug installs the same way as the gas block, with a simple coil pin driven in from the side. This makes for an extremely robust mount for a bayonet. Be sure to use a BRN-4 16” gas block for this barrel. The muzzle features ½-28 threads, so it can accept the standard A2 flash hider found on the M27, or any common aftermarket AR15 muzzle device. Barrel extension has M4 feed ramps to accept a wide variety of 223 or 5.56 ammunition.
Compatible with the Brownells BRN-4 upper receiver group, and is also compatible with HK®, 416, MR556 and MR223 platforms.
Original price was: $349.99.$262.49Current price is: $262.49.
“M27” inspired 5.56x45mm Barrel for the BRN-4® platform
Not previously available in this configuration, the BRN-4 M27 16.5 inch 5.56x45mm NATO chrome lined barrel features a forward mounted bayonet lug. Manufactured by Faxon for Brownells, these manganese phosphate barrels are machined from 4150 chrome moly steel, and feature a precision buttoned rifle 1-7 twist bore with chrome lined 5.56x45mm NATO chamber.
The bayonet lug attaches after installation of the gas block. The bayonet lug installs the same way as the gas block, with a simple coil pin driven in from the side. This makes for an extremely robust mount for a bayonet. Be sure to use a BRN-4 16” gas block for this barrel. The muzzle features ½-28 threads, so it can accept the standard A2 flash hider found on the M27, or any common aftermarket AR15 muzzle device. Barrel extension has M4 feed ramps to accept a wide variety of 223 or 5.56 ammunition.
Compatible with the Brownells BRN-4 upper receiver group, and is also compatible with HK®, 416, MR556 and MR223 platforms.
77 in stock
“M27” inspired 5.56x45mm Barrel for the BRN-4® platform
Not previously available in this configuration, the BRN-4 M27 16.5 inch 5.56x45mm NATO chrome lined barrel features a forward mounted bayonet lug. Manufactured by Faxon for Brownells, these manganese phosphate barrels are machined from 4150 chrome moly steel, and feature a precision buttoned rifle 1-7 twist bore with chrome lined 5.56x45mm NATO chamber.
The bayonet lug attaches after installation of the gas block. The bayonet lug installs the same way as the gas block, with a simple coil pin driven in from the side. This makes for an extremely robust mount for a bayonet. Be sure to use a BRN-4 16” gas block for this barrel. The muzzle features ½-28 threads, so it can accept the standard A2 flash hider found on the M27, or any common aftermarket AR15 muzzle device. Barrel extension has M4 feed ramps to accept a wide variety of 223 or 5.56 ammunition.
Compatible with the Brownells BRN-4 upper receiver group, and is also compatible with HK®, 416, MR556 and MR223 platforms.
| Weight | 2.25 lbs |
|---|---|
| Cartridge | AKK_5.56 x 45 |
| Barrel Length | 16.5'' |
| Model | BRN-4, MR556, MR27, HK416, M27, MR556A1 |
| Make | Brownells, Heckler & Koch |
| Make/Model | Heckler & Koch, MR556A1, Brownells, BRN-4, Heckler & Koch, MR556, Heckler & Koch, HK416, Heckler & Koch, M27, Heckler & Koch, MR27 |
| Finish | Black |
| Muzzle Threads | 1/2-28 |
| Contour | Medium |
| Twist | 1-7 |
| Gas System Length | 416 |
We stock both premium factory-new components and high-quality once-fired brass. Please check the specific product listing title and description carefully; once-fired brass is fully inspected, but we always recommend resizing and inspecting prior to priming and powder charging.
Our standard reloading dies and case length trimmer accessories utilize industry-standard threads (typically 7/8"-14) compatible with major single-stage, turret, and progressive presses like RCBS, Hornady, Lee Precision, and Dillon. Caliber-specific trim gauges must match your exact brass caliber.
Yes. Non-hazardous reloading equipment (dies, case length trimmers, gauges, and unprimed brass) ships via standard ground carriers with no extra fees. Any orders containing smokeless powders or primers will incur standard federal HazMat handling fees and cannot be shipped via air transportation.
Precision reloading gear is valuable, so all orders are shipped with tracking enabled. As soon as your package is dispatched from our inventory warehouse, a tracking number will be emailed to you. You can monitor your shipment directly on our Track Order page using your unique Order ID.
We accept returns on unused, unaltered tools, case preparation equipment, and unopened component boxes within 30 days of item delivery. Due to safety and strict quality control on the reloading bench, we absolutely cannot accept returns on opened packs of primers, smokeless powder, or processed brass casings.
