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JP Adjustable Gas System
A2/M4 sight
.750 bore
Black Stainless
Locking Adjustment

The JPGS-2FS is an A2/M4 front sight assembly that replaces existing pin-on assemblies and provides a gas adjustment. This unit can also be used as a front sight only to extend the sight radius of any existing carbine or rifle.

This is a standard-height A2 front sight gas block, not the taller “F-marked” height.

  • Full coverage around gas port providing improved seal and better heat dissipation
  • True clamp-on design with two positive clamping screws
  • Easy to access side gas adjustment


  • Barrel Diameter: .750
  • Finish: QPQ
  • Weight: 3.9 oz.
  • Material: 416 stainless
  • Weight: 3.9 oz.
  • Length: 1.870″
  • Height: 3.400″ (overall), 2.650″ (over bore)
  • Width: .870″
  • Attachment: 10-32 x 1/2″ socket head screws, 5/32 hex drive
    (includes 5/64″ x 5/16″ roll pin for gas tube installation)
  • Adjustment: 8-32 x 1/4″ stainless set screw, 5/64 hex drive (hex key included)



JP Enterprises


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JP Enterprises A2/M4 Front Sight .750 Adjustable Gas System

Our Price:

JP Enterprises A2/M4 Front Sight .750 Adjustable Gas System $142.25
  • MSRP$149.95
  • UPC812872021454

Total in stock: 1

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5004 State Highway 74 Cape Girardeau, MO 63701
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