Preview: JP Variable Mass Operating System

by
posted on October 19, 2016
vmos-a.jpg
JP Enterprises new Variable Mass Operating System (VMOS) bolt carrier enables rifles to be easily tuned for a wider range of applications, such as suppressed rifles or exotic calibers.

"There's no such thing as 'one size fits all' in AR operating systems," states JP founder John Paul. "Tuning your rifle is the only way to realize its potential and provide the performance you want. That's why we pioneered the adjustable gas block concept more than two decades ago. Tuning can be the difference between reliable function and reliable frustration."
null
JP says, "The VMOS bolt carrier ensures reliable function, especially for systems without an adjustable gas block."

Like JP's other carriers, the VMOS models increase bearing surface. The cocking pad is longer, and exterior bearing surfaces are polished before the carrier undergoes a multi-vendor QPQ (Quench-Polish-Quench) process.

The VMOS is available now for large-frame (.308) AR-type rifles starting at $319.95. This standard version of the large-frame VMOS carrier includes three steel weights. Two weights can be exchanged for heavier tungsten ones. JP plans to release a small frame (.223) version early next year.

Latest

Leupold Mark4hd 5
Leupold Mark4hd 5

New: Leupold Mark 4HD Riflescope Family

Leupold recently announced its new Mark 4HD family of riflescopes, with model sizes ranging from 1-4.5X 24 mm to 8-32X 56 mm.

USPSA Activity Numbers Show Record-Breaking Year In 2023

USPSA’s record-breaking year: Surging membership, activity levels unveiled in 2023 results. Also worth noting—many new USPSA members are choosing Carry Optics as their division of choice.

New: Real Avid Master Bench Block Pro Kit

Real Avid introduces the Master Bench Block Pro Kit, which includes the Bench Block Pro, along with a set of tools for working on firearm assemblies.

WATCH: Winchester Ammunition Pushing Limits Of Shotshell Innovation

Watch this “American Rifleman Television” segment to learn more about how Winchester Ammunition innovates in the shotshell marketplace.

New: Warne Shotgun Rib Mount For Red-Dot Optics

Warne Scope Mounts introduces new Shotgun Rib Mounts for attaching red-dot sights to scatterguns.

New: Christensen Arms Modern Precision Rifle Rimfire

Utah-based Christensen Arms expands its Modern Precision Rifle lineup with the new MPR Rimfire bolt-action rifle available chambered in .22 LR, .22 WMR and .17 HMR.

Interests



Get the best of Shooting Sports USA delivered to your inbox.