UPC 7290111585005 from 46 retailers

  • Magazines
  • .380 ACP
  • FAB
Shipping:

FAB Defense FX4210B Mag Extension 380 ACP 4rd Compatible w/Glock 42

Price History
F.A.B. Defense FX4210B Mag Extension 10rd Compatible with Glock 42 380 ACP
Free Shipping > $500
$18.88/ct $18.88 Shooting Surplus ★★★★★ (193)
FAB Defense FX4210B Mag Extension 380 ACP 4rd Compatible w/Glock 42 Black Polymer
Shipping $13 Free Shipping > $500
$20.30/ct $20.30 Axolotl Arms ★★★★★ (126)
Low cost shipping boost

UPC 7290111585005 Price Graph

  • Today's low of $18.88/mag is cheaper than 6% of daily lows in the last 180 days.
  • Today's average of $25.34/mag is more expensive than 50% of daily averages in the last 180 days.
  • The low peaked at $19.97/mag on August 13, 2026 and bottomed at $18.88/mag on October 23, 2026.

FAB Defense Glock 42 Polymer Magazine Extension, Black - FX4210B
$20.19/ct $20.19 Palmetto State Armory ★★★★★ (1,164)
FAB Defense FX4210B Mag Extension 380 ACP 4rd Compatible w/Glock 42 Black Polymer
Shipping $20
$23.22/ct $23.22 Custom Creatives Group ★★★★★ (24)
FAB Defense FX4210B Mag Extension 380 ACP 4rd Compatible w/Glock 42 Black Polymer
Shipping $10 Free Shipping > $100
$25.80/ct $25.80 Conkey's Outdoors ★★★★★ (175)
FAB Defense FX4210B +4 Magazine Extension for Glock 42
Shipping $10
$25.80/ct $25.80 Alexander's Store ★★★★★ (1,532)
FAB Defense FX4210B Mag Extension 380 ACP 4rd Compatible w/Glock 42 Black Polymer
Shipping $11
$25.80/ct $25.80 Underground Tactical
FAB Defense FX4210B Mag Extension 380 ACP 4rd Compatible w/Glock 42 Black Polymer
Shipping $11
$25.80/ct $25.80 Selway Armory ★★★★★ (186)
Fab Defense Magazine Extension for Glock 42 +4/rd
Shipping $15 Free Shipping > $500
$25.80/ct $25.80 Kinetic Armory ★★★★★ (3)
FAB Defense FX4210B Mag Extension 380 ACP 4rd Compatible w/Glock 42 Black Polymer
Shipping $15 Free Shipping > $149
$25.80/ct $25.80 Extreme Products ★★★★★ (83)

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FAB Defense FX4210B Mag Extension 380 ACP 4rd Compatible w/Glock 42 Black Polymer
Shipping $15 Free Shipping > $500
$25.80/ct $25.80 Garrison's Guns ★★★★★ (21)
FAB Defense FX4210B Mag Extension 380 ACP 4rd Compatible w/Glock 42 Black Polymer
Shipping $18
$25.80/ct $25.80 Sharp's Shooting Supply ★★★★★ (34)
FAB Defense FX4210B Mag Extension 380 ACP 4rd Compatible w/Glock 42 Black Polymer
Shipping $20
$25.80/ct $25.80 JB Armament ★★★★★ (126)
Fab Defense Magazine Extension for Glock 42 +4/rd
Shipping $20 Free Shipping > $1,000
$25.80/ct $25.80 Life2A ★★★★★ (3)
Fab Defense Magazine Extension for Glock 42 +4/rd
Shipping $20
$25.80/ct $25.80 Down Range Firearms ★★★★★ (8)
FAB Defense FX4210B Mag Extension 380 ACP 4rd Compatible w/Glock 42 Black Polymer
Shipping $20 Free Shipping > $1,000
$25.80/ct $25.80 Dave's Guns ★★★★★ (28)
Fab Defense Magazine Extension for Glock 42 +4/rd
Shipping $25 $25 Off Orders $200+ Code LOCKNLOAD25
$25.80/ct $25.80 Scottsodg.com
FAB Defense FX4210B Mag Extension 380 ACP 4rd Compatible w/Glock 42 Black Polymer
$5 Off Code CALIBERKING
$25.80/ct $25.80 Gun Place ★★★★★ (206)
Fab Defense Magazine Extension for Glock 42 +4/rd
Free Shipping > $250 $15 Off Orders $75+ Code CALIBERKING
$25.80/ct $25.80 Brickhouse Firearms
FAB Defense FX4210B Mag Extension 380 ACP 4rd Compatible w/Glock 42 Black Polymer
Free Shipping > $500
$25.80/ct $25.80 Timber Hole Outdoors ★★★★★ (6)
Fab Defense Magazine Extension for Glock 42 +4/rd
Free Shipping > $700
$25.80/ct $25.80 Freedom Firearms ★★★★★ (2)
Fab Defense Magazine Extension for Glock 42 +4/rd
Free Shipping > $1,250
$25.80/ct $25.80 Nadir Solutions ★★★★★ (18)
FAB Defense FX4210B Mag Extension 380 ACP 4rd Compatible w/Glock 42 Black Polymer
Free Shipping > $900 CC Fee 3%
$25.80/ct $25.80 Armed in Michigan ★★★★★ (714)
FAB Defense FX4210B Mag Extension 380 ACP 4rd Compatible w/Glock 42 Black Polymer
$25.80/ct $25.80 Allied Arms ★★★★★ (310)
FAB Defense FX4210B Mag Extension 380 ACP 4rd Compatible w/Glock 42 Black Polymer
$25.80/ct $25.80 Coastal Firearms
FAB Defense PLUS 4 Mag Extension for Glock 42 - Black
$25.80/ct $25.80 Georgia Guns & Ammo ★★★★★ (2)
FAB Defense FX4210B Mag Extension 380 ACP 4rd Compatible w/Glock 42 Black Polymer
$25.80/ct $25.80 Big Bee Bee ★★★★★ (11)
Fab Defense Magazine Extension for Glock 42 +4/rd
$25.80/ct $25.80 Vital Defense ★★★★★ (14)
Fab Defense Magazine Extension for Glock 42 +4/rd
$25.80/ct $25.80 Firearms Express
FAB Defense FX4210B Mag Extension 380 ACP 4rd Compatible w/Glock 42 Black Polymer
$25.80/ct $25.80 CLB Guns ★★★★★ (45)
FAB Defense FX4210B Mag Extension 380 ACP 4rd Compatible w/Glock 42 Black Polymer
$25.80/ct $25.80 Bulletproof Outfitters ★★★★★ (133)
FAB Defense FX4210B Mag Extension 380 ACP 4rd Compatible w/Glock 42 Black Polymer
$25.80/ct $25.80 Don's Weaponry ★★★★★ (252)
FAB Defense FX4210B Mag Extension 380 ACP 4rd Compatible w/Glock 42 Black Polymer
$25.80/ct $25.80 Tungsten Creek Tactical
FAB Defense FX4210B MAG Extension 380 ACP 4RD Compatible W/Glock 42 Black Polymer
$25.80/ct $25.80 Shiner Tactical ★★★★★ (6)
Fab Defense Magazine Extension for Glock 42 +4/rd
$25.80/ct $25.80 Ecommerce Arms
FAB Defense FX4210B Mag Extension 380 ACP 4rd Compatible w/Glock 42 Black Polymer
$25.80/ct $25.80 EK Tactical ★★★★★ (10)
FAB Defense FX4210B Mag Extension 380 ACP 4rd Compatible w/Glock 42 Black Polymer
$25.80/ct $25.80 2 If By Sea Tactical ★★★★★ (135)
FAB Defense FX4210B Mag Extension 380 ACP 4rd Compatible w/Glock 42 Black Polymer
$25.80/ct $25.80 Birmingham Hill Armory ★★★★★ (16)
Fab Defense Magazine Extension for Glock 42 +4/rd
$25.80/ct $25.80 Pathfinder Militaria ★★★★★ (106)
Fab Defense Magazine Extension for Glock 42 +4/rd
$25.80/ct $25.80 Get Guns N Ammo
Fab Defense Magazine Extension for Glock 42 +4/rd
$25.80/ct $25.80 Precision Gunworks
Fab Defense Magazine Extension for Glock 42 +4/rd
$25.80/ct $25.80 The Arsenal Project ★★★★★ (16)
F.A.B. DEFENSE PLUS 4 MAGAZINE - EXTENSION BLACK FOR GLOCK 42
$25.80/ct $25.80 Utah Fast ★★★★★ (101)
FAB Defense FX4210B Mag Extension 380 ACP 4rd Compatible w/Glock 42 Black Polymer
$25.80/ct $25.80 Highland Arms ★★★★★ (49)
FAB Defense FX4210B Mag Extension 380 ACP 4rd Compatible w/Glock 42 Black Polymer
CC Fee 3%
$25.80/ct $25.80 Cornerstone Arms ★★★★★ (373)
Fab Defense Magazine Extension for Glock 42 +4/rd
CC Fee 6%
$25.80/ct $25.80 All Things Firearm ★★★★★ (3)

UPC 7290111585005 Price Graph

  • Today's low of $18.88/mag is cheaper than 6% of daily lows in the last 180 days.
  • Today's average of $25.34/mag is more expensive than 50% of daily averages in the last 180 days.
  • The low peaked at $19.97/mag on August 13, 2026 and bottomed at $18.88/mag on October 23, 2026.

Daily Deals Email

Gun and ammo deals at their 90-day low.

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