JP Adjustable Gas Block with Adjustable Locking Screw, A2 Front Sight with Gas Valve, Black Stainless

JP Adjustable Gas Block with Adjustable Locking Screw, A2 Front Sight with Gas Valve, Black Stainless

JPGS-2FS is a standard-height A2 / M4 front sight assembly that replaces existing pin-on front sights and adds a locking gas adjustment for on-rifle tuning. Machined from 416 stainless and finished in QPQ, this clamp-on gas block gives full coverage around the gas port for a better seal and improved heat dissipation. It installs as a true clamp-on unit using two positive clamping screws and includes a locking set screw for the gas adjustment to prevent movement once tuned. The JPGS-2FS also functions as a front sight-only unit to extend the sight radius on carbines and rifles.

Specification:

• Barrel Diameter: .750"
• Design: A2 / M4 front sight gas block - standard A2 height
• Material: 416 stainless steel
• Finish: QPQ (black stainless appearance)
• Weight: 111 g / 3.9 oz
• Length: 4.75 cm / 1.87"
• Height: 8.63 cm / 3.4" (overall), 6.7 cm / 2.65" (over bore)
• Width: 2.2 cm / 0.87"
• Attachment: (2) 10-32 × 1/2" socket head screws, 5/32" hex drive (included)
• Gas tube hardware: includes 5/64" × 5/16" roll pin for gas tube installation
• Adjustment: 8-32 × 1/4" stainless set screw (locks gas setting), 5/64" hex drive (hex key included)

Features:

• Standard A2 / M4 front sight height (not F-marked/tall)
• True clamp-on design with two positive clamping screws — no barrel pinning required
• Full coverage around gas port for improved sealing and heat dissipation
• Locking gas adjustment: 8-32 stainless set screw secures chosen gas setting
• Side-accessible gas adjustment for convenient on-rifle tuning
• Precision 416 stainless construction with QPQ finish for corrosion resistance