About this rifle barrel
Brownells BRN-4/M27 5.56X45 16.5" Medium Chrome Lined Barrel Phosphate is a rifle barrel for the Brownells|BRN-4, 16.5 in, 1-7 twist, 1/2-28 threads.
Match the barrel to your platform (gas system length, barrel extension and thread pitch on an AR; the exact action on a bolt gun). Twist rate decides which bullet weights stabilize: faster twists suit heavier bullets.
Manufacturer details
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.
Features
- “M27” inspired 5.56x45mm Barrel for the BRN-4® platform
Specifications
- Brand: Brownells
- Compatibility: Brownells|BRN-4
- Thread Pattern: 1/2-28
- Barrel Length: 16.5 in
- Twist: 1-7
- Finish: Black
- Gas System Length: 416
- Contour: Medium
- UPC: 050806001480
Buying from WBT Guns
- Delivery: Ships to your door anywhere in the United States, or pick it up free at our La Mesa store.
- Payment: Pay in full or finance with Credova.
- Questions: Fitment or compatibility questions? Call (619) 667-9453 or email sales@wbtguns.com. FAQ
WBT Guns is family-owned in La Mesa, California, and has served shooters since 2012.
A note on accuracy. Specifications, fitment and images come from the manufacturer and can contain errors or change without notice. If a detail matters to your purchase, call us and we will confirm it before you order. Any compliance notes are general information, not legal advice; California and local laws change, and the rules that apply depend on the firearm the part goes on.
