Utilizing new material technology and manufacturing processes for enhanced strength, durability, and reliability to exceed demanding military performance specifications. Designed for the AR15/M4 but allowing use with a wide range of non-AR15/M4 platforms. EXDPM556 Features and Functions: ? 50% Stronger ? 3x More Impact Resistant than traditional nylons ? Next Generation Long Glass Fiber Polymer ? Enhanced Strength & Durability ? Ribbed front and rear gripping surface ? Long-life USGI-spec stainless steel spring ? Four-way anti-tilt self-lubricating follower ? Flared floor plate ? Oversized bolt catch? Paint Pen dot matrix ? Tool-less disassembly with double floor plate safety release tabs