WON Landing Page OCT 2022

Crimson Trace CMR-301 Rail Master Pro Laser/Light Combo

Having a laser and light on an AR for home defense just makes sense. Recently I decided to add a Crimson Trace CMR-301 Rail Master Pro, with its green laser sight and tactical light system, to an AR I had. Since this was my first time doing something like this, I asked my son Colton to help me. I wanted to make sure everything was done correctly, especially since this is a firearm for home defense. 

Crimson Trace is a manufacturer dedicated to producing the highest quality laser sights, tactical lights, electronic sights, and riflescopes for your pistols, rifles, and shotguns.

Sponsored by Crimson Trace

CMR-301 Rail Master Pro

CT CMR-301 Rail Master Pro Crimson Trace

Crimson Trace’s CMR-301 Rail Master Pro offers a powerful green laser sight and a 1000 lumen tactical light that attaches to either an M1913 Picatinny (Pic) rail or M-LOK mounting. It is programable and easily operated at the tail-cap or with a pressure pad remote switch. It also comes with a rechargeable Li-on battery. 

MSRP: $314.99

Close up of Modes

The phosphorescent mode dial icons on the CMR-301 glow in the dark to make mode selection easier in low light. Available modes include the following settings: off, laser only, light and laser and light only. 


First, I had to decide where to mount the CMR-301 Rail Master Pro. Since I am right handed, and didn’t want it to interfere with the iron sights, the best option was to attach it to the right side. The video below from Crimson Trace helped me make my decision. 

Rechargable Battery

Before beginning the installation, I charged the battery that came in the box. I guess I’m behind the times. I never saw a battery with a USB charging port. I like that it has an LED that turns from red to green when fully charged; it takes the guess work out. 

battery compartment CMR-301 Rail Master Pro

Next, I watched the video below (also from Crimson Trace) to see how to mount the CMR-301 to a Pic rail. I found it very helpful, especially since it was my first time doing anything like this. 

M1913 mount
Crimson Trace

Now, with the Pic rail installed where I needed it, I snapped the M1913 mount in, noting the muzzle direction arrow.

installing CMR-301 Rail Master Pro

Then, using the screws provided, I attached the CMR 301 to the mount plate. Easy peasy!

Installing pressure pad of CMR-301 Rail Master Pro

In order to make sure the pic rail was in the correct place for the remote switch pressure plate, I attached the cable and shouldered the rifle. Colton then moved the pressure plate around to find out where I had the easiest access to it. We put a pencil mark there and attached the pic rail, then secured the pressure plate. 

Installing pressure pad of CMR-301 Rail Master Pro 2
Crimson Trace

As you can see, installing the CMR 301 is super easy and quick. Now, I just have to wait for the weather to break in Ohio and find time to get out to the range and shoot it. But in the meantime, I can practice mounting the AR and turning the light and laser on and off (with an empty gun of course). 

CMR-301 and rifle
Crimson Trace

Learn more about Crimson Trace’s CMR-301 Rail Master Pro here

  • About Michelle Cerino

    Michelle Cerino, aka Princess Gunslinger, first entered the firearms industry in 2011 as co-owner, president and trainer at a national training company. She immediately began competing in both 3-Gun and NRA Action Pistol, becoming a sponsored shooter. Michelle is currently a columnist and Managing Editor of Women’s Outdoor News, as well as owner of Pervenio LLC. She also manages social media for Vera Koo and GTM Original. Michelle encourages others to step out of the comforts of home and explore.