I'm interested in trading a Brand New 5.56 barrel for a new 300 Blackout barrel.
The following are the Specs on the 5.56 barrel
16" Gov Contour 5.56, 4140 Chrome Moly- 1/8 Twist
JBO Chrome Moly barrels are made to our custom specifications right here in the USA! These barrels are button rifled for excellent accuracy, with a Magnesium Phosphate Parkerize finish, and threaded 1/2x28" for all popular muzzle device compatibility and suppressor use. We tuned the gas port size to offer excellent reliability with 5.56 or .223 ammo without being over-gassed.
*Barrel Length: 16″
*Gas Block Seat: .750" with a 1.9" gas block seating to allow use of any standard or micro gas blocks
*Rifling: 1 in 8 Twist Six Groove Button Rifled
*4140 Chrome Moly
*Light barrel contour under handguard (.680")
*Heavy barrel contour forward of gas block (.740") to muzzle
*Feed Ramps: M4 Barrel Extension-Heat Treated & Polished 4140 Chrome Moly
*Gas System: Mid-length
*Gas Port Size: .076"
*Chamber: 5.56MM (Will reliably shoot 5.56 or 223 ammo)
*Finish: Magnesium Phosphate Parkerized
*Twist: 1:8 RH
*Thread Pitch: 1⁄2×28"
Proudly Made in the USA!
Solid barstock for our barrels is received at our barrel manufacturer's shop and then the manufacturer does all cutting, profiling, and button rifling under 1 roof. Bar stock is all from USA steel mills and is stress relieved and certified for hardness prior to barrel production.