Windham Extractor Spring Insert for AR15/M16

Ar .308 Enhanced Super Duty Ejector Springs - Enhanced Super Duty Ejector Spring- Standard Power

Windham 16SFS-308 .308 Win. Flat-Top Rifle with Midwest Key Mod Handguard

Ar .308 Dual Extractor Cs Spring Upgrade Kits - Spring Upgrade Kit-Xp 5-Coil Extractor Spring/Inner Spring

Windham 18FSFSM-308 .308 Win. Flat-Top Rifle w/ M-LOK Handguard and Magpul MOE

Ar 308 M4 Extension Tube Cs Spring Kit - Spring Kit-Xp Buffer Spring W/ Dual Extractor Springs

Windham Weaponry SRC MID Rifle | R16MLFTT

Ar-15 Extractor Inserts & O-Rings Mil-Spec - Triple Black Extractor Insert & Viton O-Ring 3 Pk