Description
Glock 20 Gen 4 Green Laser Performance
The Glock 20 Gen 4 green laser is engineered specifically for Glock 20 (Gen 4), Glock 21 (Gen 4), and Glock 41 (Gen 4) pistols. The LMS-G4-1151G replaces the factory recoil spring guide assembly with a rugged internal green laser sighting system built for advanced target acquisition.
Its proximity to the bore provides maximum POA/POI accuracy and consistent alignment for center-of-mass shots.
Rugged Internal Construction
Constructed with aircraft-grade aluminum and genuine Wolff springs, this Guide Rod Laser is built for long-term durability and dependable performance.
The internal design:
- Does not restrict grip selection
- Does not interfere with holster compatibility
- Preserves factory ergonomics
Because the laser replaces the factory guide rod assembly, there are no external mounting components altering the pistol’s profile.
Programmable Green Laser Output
The high-intensity green laser is user programmable for:
- Pulsing beam
- Steady beam
A distinct ambidextrous ON/OFF switch reinforces safe firearm handling and allows intuitive activation from either side.
The system is factory-aligned to stock ballistics to ensure consistent POA/POI accuracy right out of the box.
Key Features
- Designed for Glock 20, 21 & 41 (Gen 4)
- Replaces factory recoil spring guide assembly
- High-intensity green laser
- User programmable pulse or steady beam
- Aircraft-grade aluminum construction
- Genuine Wolff springs
- Ambidextrous ON/OFF switch
- Internal design preserves grip and holster options
- Factory-aligned for guaranteed POA/POI accuracy
John Henry (verified owner) –
So far I’m a fan. My only complaint is the lack of heavier recoil springs in the event that I want to run +P ammo.
Mr Knight (verified owner) –
Bought a green laser for my G21SF… the spring on the laser is too heavy and will only cycke +P ammo… which is too expensive to practice with 🙁 need a 17lb spring… was going to swap out stock spring but its flat wound and won’t fit – the laser spring seems to be above 20lbs!
OpieinSA (verified owner) –
Fast shipping, great packaging, and very detailed instructions. Sturdy design. Offered military discount with proper ID.
Erik Stevenson –
Loved my first one that was unknowingly installed on a G23 LE trade in I purchased from a pawnshop. Installed the green one in my LE trade in G21.
Henry Saiz (verified owner) –
I’ve been saving bullets here at the ranch chasing those critters down.
Johnny Campbell (verified owner) –
My old eyes really like these internal green lasers! They’re easy to activate when needed but not easy to turn on by accident when carrying in holsters, pockets & car/truck magnets or glovebox, which means very little chance of wasting battery! And being a guide rod makes them the closest place to the barrel making them very accrete. And don’t believe what I’ve been told by a couple people that recoil will affect them, I’ve had them in a 40S&W Glock and Glock 21 45 ACP with many rounds put through both & they still preform just as well as the day I installed them! They are very easy to install too. I have three of these, 1) in a Beretta 92FS 9mm 1) in a Glock 23 40SW and 1) in a Glock 21 45 ACP.
The only drawback I have is they are very pricey! If they were cheaper I’d have one in every firearm they make them for!
JC Old shooter.