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Rosco Manufacturing Bloodline 5.56 AR-15 Barrel Sauce Pack - 12.5"

Manufactured by Rosco Manufacturing
SKU: SP-BL-125-556-BCG-GTC-NGB-001
MPN: SP-BL-125-556-BCG-GTC-NGB-001
Manufactured by Rosco Manufacturing
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Standard orders will ship out 2 business days if ordered by 3:30 pm CST, Monday-Friday. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination.



Getting the perfect components to finish your build can sometimes be a pain, especially if you find yourself with parts that you thought should work together that somehow don't when you get ready to assemble your rifle. Take the guesswork out of your next build with a Sauce Pack from Rosco Manufacturing! Each Sauce Pack contains a selection of parts hand picked from their Bloodline hard-use products for when "good enough" just doesn't cut it. Barrel, bolt carrier group, gas tube, and a non-adjustable gas block have all been carefully selected, giving you a quick and easy, highly reliable parts kit that will elevate any build.


  • 12.5" 5.56 NATO Bloodline Barrel
  • 41V50 Chrome Moly Vanadium Steel with black Nitride finish
  • Carbine-length gas system with Government Contour
  • M16-pattern Bloodline Bolt Carrier Group
  • Low friction Melonite finish
  • .223 Rem / 5.56 NATO / 300 Blackout bolt assembly
  • Low profile Bloodline Gas Block for .750
  • Corrosion resistant Melonite finish
  • Carbine-length Bloodline Melonited Gas Tube

Rosco Manufacturing got their start producing high quality, hard-use precision rifle barrels. They have since expanded, offering their own line of serious use parts and accessories so you can assemble a rifle that doesn't just shoot good and look good, but will handle hard use as well. To top it off, they're production facility is in Central Falls, Rhode Island so you know that every component is 100% made in America, by Americans.
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Bolt FinishMelonite
BrandRosco Manufacturing
Caliber Gauge5.56 NATO
Carrier FinishMelonite
Carrier StyleM16 Bolt Carrier
High Pressure TestedUntested
Magnetic Particle InspectMagnetic Particle Inspected
Barrel CoatingSalt Bath Nitride
Barrel ContourGovernment
Barrel Length12.5
Barrel LiningSalt Bath Nitride
Barrel Material41V50 Chrome Moly Vanadium Steel
Feed RampsM4
Gas Seat Diameter.750
Gas System LengthCarbine
Thread Pattern1/2 X 28
Twist Rate1:7

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