Will his fit a gen 4, according to Glock's website it does

I can't say for certain, but my guess is no. I bought an LG-639 for a Glock 19 Gen 3 I bought at a gun shop. The folks at the gun shop sold me an LG-851, by mistake, which fits a 19, 23, 32 Gen 4. The 851 would not fit a 19 or 23 Gen 3. I do know the 639 will fit a 19 or 23, Gen 3, I have both.

Will this fit a 9mm makarov?

fits GLOCK Compact pistols (Third Generation 19, 23, 25. 32. 38, Gen4 19, 23, 32, and Gen5 19).

Will this fit a Glock 19 Gen2 ?

I have the 639 G on my Gen 3 G19. Go to the Crimson Trace website and look up what fits a Gen 2.

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Crimson Trace LG-639 and 639G Lasergrips with Red Laser, Heavy Duty Construction and Instinctive Activation for Glock Compact Pistols, Defensive Shooting and Competition

Crimson Trace LG-639 and 639G Lasergrips with Red Laser, Heavy Duty Construction and Instinctive Activation for Glock Compact Pistols, Defensive Shooting and Competition

Product ID: 15490644

Details

Brand
Crimson Trace
Color
Black
Manufacturer
Crimson Trace
Material
Plastic
UPC
610242005499

🎯Precision laser sight adjustable to 20 yards

💡Bright green laser visible day & night

🔫Heavy-duty grip for Glock compacts

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MOP$3477

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Sold byAmazon MacauDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎯 Lock on. Light up. Lead the pack.

READY FOR DEFENSE - Instant laser activation on grip for fast, confident home protection.
RUGGED RELIABILITY - Built tough to survive drops and daily use without losing zero.
ENHANCED VISIBILITY - High-mounted green laser ensures clear aiming in all lighting conditions.
PRECISION TARGETING - Intuitive laser activation with easy sight adjustment for pinpoint accuracy.
SEAMLESS INTEGRATION - Designed specifically for Glock compacts with minimal profile increase.

The LG-639G Lasergrip by Crimson Trace is a heavy-duty, green laser sight designed for Glock compact pistols. It offers intuitive activation, rugged construction tested against drops, and precise sighting adjustable to 20 yards. Its high-mounted laser reduces parallax for superior accuracy, making it ideal for defensive shooting and competition. While it adds some grip girth and may require minor mag release modifications on older Glock models, it integrates seamlessly with most holsters and delivers reliable performance day and night.

Specifications

ASIN	B00JSAO9CS
Best Sellers Rank	#596,222 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #1,934 in Hunting & Shooting Gun Grips
Brand Name	Crimson Trace
Color	Black
Customer Reviews	4.2 4.2 out of 5 stars (141)
Included Components	Product
Item Type Name	Holster
Manufacturer	Crimson Trace Corporation
Manufacturer Part Number	LG-639G
Material Type	Plastic
Model Number	LG-639G
UPC	610242005499
Warranty Description	3-YEAR LIMITED WARRANTY, https://www.crimsontrace.com/support/warranty

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