ActionGunner

JP-5/MP5 Roller Replacement Kit, Standard

JP-5/MP5 Roller Replacement Kit, Standard
// Quick Overview
JP roller kit for the JP-5 and H&K MP5 in Standard: two bearing-steel rollers plus retainer spring and pin. Measure bolt gap first; pick the size that brings it back into spec.
Rollers are the wear item that sets bolt gap on a roller-delayed gun, and bolt gap is what decides whether a JP-5 cycles. This kit carries the Standard size: standard-size rollers, the size a JP-5 ships with, for restoring a gun whose gap has drifted or replacing rollers damaged in service.
JP machines the rollers from a proprietary bearing steel and finishes them to outlast the aftermarket rollers sold for MP5-pattern guns. Each kit has two rollers, a roller retainer spring, and the spring pin, so one kit does one bolt head.
One thing to know: the rollers fit the H&K MP5, but JP says the roller retainer spring in the kit does not. Clones should be checked for H&K-standard parts. And the size is not a guess: measure bolt gap first with the gauge set, swap, then measure again, because the whole point of a roller change is landing inside JP's gap window.
The trade-off is that buying the wrong size solves nothing. A shooter who does not know the current gap should start with the gauge set, not the rollers.
JP Enterprises
JP5 Parts · Maintenance · Rifle Parts & Upgrades · USPSA
SKU JP5-RK
JP-5 and H&K MP5 shooters whose bolt gap measurement calls for Standard rollers, and high-volume PCC competitors keeping a spare set on hand.

$33.95

Out of stock

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Description

The JP-5/MP5 Roller Replacement Kit in Standard contains two Standard rollers, a roller retainer spring, and a spring pin for the JP-5 roller-delayed carbine. JP makes the rollers from a proprietary bearing steel and offers them in five sizes (Standard, +2, +4, -2, -4) to bring the bolt gap of a worn JP-5 or H&K MP5 back into working range.
This listing is the Standard size: standard-size rollers, the size a JP-5 ships with, for restoring a gun whose gap has drifted or replacing rollers damaged in service. Bolt gap should be measured before choosing a size and confirmed again after installation.
JP’s rollers are compatible with the H&K MP5. The roller retainer spring in the kit is JP-5 specific and does not fit the MP5. Owners of non-H&K MP5 clones should verify H&K-standard parts compatibility before buying.
What’s Included:
  • Two Standard rollers
  • One roller retainer spring (JP-5 specific)
  • One spring pin
What’s NOT Included:
  • Bolt gap gauges (see JP-5 Bolt Gap Gauge Set)
  • Other roller sizes (each size is a separate kit)
  • Tools
Disclosure: Action Gunner is an authorized JP Enterprises dealer and stocks this part in the Pro Shop. Product facts on this page come from JP unless noted.
ManufacturerJP Enterprises
ModelJP-5 Roller Replacement Kit
Manufacturer Part #JP5-RK
Roller SizeStandard
Sizes Offered by JPStandard, +2, +4, -2, -4
MaterialProprietary bearing steel
Contents2 rollers, roller retainer spring, spring pin
PlatformJP-5; H&K MP5 (rollers only; retainer spring is JP-5 specific)
Country of OriginUSA

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Pairs with: JP-5 Bolt Gap Gauge Set, JP-5 Maintenance Kit, other JP-5 roller sizes

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