Photo File: Daniel Defense RIS II FSP for M4A1

At SOPMOD Block 2, the RIS II for the MK18 Mod1 is already very well-known, but the classic M4A1 is also supposed to look different. Here is the RIS II FSP for it: it is longer and combines in one cutout with the front sight post of the M4A1. Due to the extension, the AN/PEQ15 can now be mounted in front of the front sight post.

That's what you get in the box when you buy the RIS2 for the M4A1. On the left are the mounting parts with screws.

The rails on the sides. The bottom part is secured with four screws - two on each side - after insertion.

The FSP Rail mounted.

DANIEL DEFENSE on the Internet: danieldefense.com

Comparison between RIS II and FIS II FSP below. The front sight post is the distinguishing feature.