Rosco Manufacturing

The K9 11.5 offers a proprietary patrol length gas system that is smoother than carbine length, more reliable than mid-length. Features an optimized gas port to run reliably suppressed and/or...

The 14.5" M4 5.56 NATO Bloodline Barrel (Mid-Length). This 14.5" M4 5.56 NATO Mid-Length barrel was designed around the USASOC specs for an Improved Upper Receiver Group with a little bit of the...

The 16" M4 5.56 NATO Bloodline Barrel (Mid-Length). This 16" M4 5.56 NATO Mid-Length barrel was designed around the USASOC specs for an Improved Upper Receiver Group with a little bit of the Rosco...

The Rosco Sauce Pack bundles were created after direct requests from Rosco's customers to provide them with the key components needed for their carbine/pistol builds at a great combined price. The...

The Rosco Sauce Pack bundles were created after direct requests from Rosco's customers to provide them with the key components needed for their carbine/pistol builds at a great combined price. The...

The Rosco Sauce Pack bundles were created after direct requests from Rosco's customers to provide them with the key components needed for their carbine/pistol builds at a great combined price. The...

This Rosco 10.5" 300 Blackout barrel was designed for SBR and Pistol use in conjunction with suppressors. The 10.5" 300 Blackout Rosco barrel was made to be a direct replacement for any MK 18...

Bloodline 10.5" M4 5.56 NATO: This Rosco 10.5" M4 5.56 NATO Bloodline Barrel is designed to be the perfect addition to any SBR or Pistol build. ALL NFA RULES APPLY! Rosco 5.56 (NATO) barrels are...

Bloodline 11.5" M4 5.56 NATO: This Rosco 11.5" M4 5.56 NATO Bloodline Barrel is designed to be the perfect addition to any SBR or Pistol build. ALL NFA RULES APPLY! Rosco 5.56 (NATO) barrels are...

16" M4 5.56 NATO Bloodline Barrel: This Rosco 16" M4 5.56 NATO Bloodline Barrel is the perfect addition to your next build featuring perfect balance, properly sized gas ports in order to optimize...

This Rosco 8.2" 300 Blackout Bloodline Barrel was designed for SBR and Pistol use in conjunction with suppressors. This is the shortest that Rosco will go to allow you the flexibility of a shorter...

This Glock Bloodline barrel is designed to work with Glock 17 pistols, generations 1 through 4. Although this is a simple to accomplish user friendly swap, they still encourage you to consult a local...