Cycling problems? The VMOS™ brings the discipline your rifle needs.

JP VMOS™ Bolt Carrier

   Small-Frame (.223)

   Stainless Steel

   QPQ Black Finish

For difficult setups like suppressed rifles and exotic caliber chamberings, some degree of mass regulation is required for optimal performance. This is especially true in the absence of an adjustable gas block. Residual gas and excessive fouling can grind your rifle to a stop.

One size never fits all when it comes to gas-operated rifles. The Variable Mass Operating System (VMOS™) carrier ensures reliability through additional reciprocating mass but provides more custom tunability. Combined with our Silent Captured Spring, multiple masses are exchangeable to perfectly tune your operating system weight.

Package includes carrier, Enhanced Gas Ring and instruction sheet.

For a complete operating system, this carrier pairs best with the JPSCS2-15H2.

Patent Pending

Weight: 10.7 oz.

Features:

Enhanced tunability of operating system

Guaranteed reliability of difficult configurations

Overcomes all fouling build-up

Roller-burnished bore for frictionless operation

Rock-hard QPQ finish provides remarkable natural lubricity

Extremely smooth cycling with proper lubrication

Increased bearing surfaces for slower wear and longer component life

Longer cocking pad for optimal reliability

Additional forward assist serrations for one full inch of travel

Compatibility:

VMOS™ carriers use the same steel and tungsten weights as GEN 2 Silent Captured Spring units. Only the forward mass is reconfigurable. The rear steel mass cannot be exchanged.

This carrier will not cycle with a standard buffer retainer plunger installed.Standard buffer/spring components must be installed "loose" or replaced with a Silent Captured Spring.

Notice:

The JPBC-6 bolt carrier is full-auto capable when used in conjunction with other select-fire components. All NFA rules apply.