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No, they will not. The Glock 34 features a full-size frame, and the minimum capacity magazine it will accept is a 17-round magazine.
Glock 34 Magazines
Showing 13–24 of 58 resultsSorted by popularity
SALE 
Magpul PMAG 17 GL9 9mm 17 Round Magazine for Glock 17 Pistols (10 Pack)
Magpul PMAG 17 GL9 9mm 17 Round Magazine for Glock 17 Pistols (10 Pack)
123 reviews
Original price was: $149.99.$124.99Current price is: $124.99.
SALE 
Magpul PMAG 27 GL9 9mm 27 Round Magazine for Glock 17, 19 Pistols (3 Pack)
Magpul PMAG 27 GL9 9mm 27 Round Magazine for Glock 17, 19 Pistols (3 Pack)
53 reviews
Original price was: $59.99.$54.99Current price is: $54.99.
Out of stock
SALE 
Glock 17 9mm 10 Round Gen 4 Magazine
Glock 17 9mm 10 Round Gen 4 Magazine
21 reviews
Original price was: $26.99.$21.99Current price is: $21.99.
Rattlesnake Tactical 9mm 34 Round Extended Magazine for Glock 17, 19 Pistols
22 reviews
$9.99
Out of stock
Frequently Asked Questions
Will a standard Glock 15-round fit the Glock 34?
What Glock models share magazine compatibility with my Glock 34 magazine?
Common Glock models that share magazine compatibility with the Glock 34 magazine include: Glock 17, 19, 26, 45, 47, and other double-stack 9mm models.