KNS Precision DISCARDER Gas Piston for FN SCAR 16S/17S

The KNS Precision DISCARDER (DIal Screwless CARrier and Dial Enhanced Regulator) replaces the factory gas piston system in FN SCAR 16S and 17S rifles to provide precise, tool-free gas regulation. Instead of fumbling with the factory two-position gas valve, the DISCARDER allows shooters to dial in gas flow for suppressed or unsuppressed fire, reducing recoil impulse, minimizing gas blowback, and extending component life. This system is particularly valuable for SCAR owners who run suppressors frequently or shoot with varying ammunition weights.

Machined from hardened steel with a nitrided finish, the DISCARDER integrates a numbered adjustment dial directly into the carrier assembly. Gas adjustment is performed by rotating the dial—no screws, no tools, no disassembly required. Installation requires removal of the factory gas piston and carrier; while straightforward for experienced owners, those unfamiliar with SCAR disassembly may prefer professional installation. The system maintains full reliability across settings when properly tuned to your ammunition and suppressor combination.

• Part Type: Adjustable Gas Piston System
• Compatible Firearms: FN SCAR 16S, FN SCAR 17S
• Material: Hardened Steel
• Finish: Nitrided
• Installation: Moderate – Requires Disassembly of Gas System (Professional Recommended for Inexperienced Users)
• Includes: DISCARDER Assembly, Installation Instructions