Glock Magazine Gen 4 Glock 21, 21SF 45 ACP Polymer Black
- Glock magazines have very stiff springs when new and may be extremely difficult to load to full capacity. It may be necessary to use a Glock magazine loader (generally included in the Glock case with the handgun) to load the magazine to capacity or near capacity.
- If the last round appears impossible to load, for example if the magazine should hold 15 rounds and it will only accept 14, leave it loaded with 14 rounds for several days to allow the spring's tension to decrease. After a short time, the magazine should then accept its full capacity, but it may still be necessary to use the magazine loader. After several cycles of full capacity through empty, the magazine will be easier to load.
NOTE: All current production Glock magazines are also compatible with all previous generations of Glock pistols.
Thank you! Your valuable feedback helps improve our product information and offering.
The statements and opinions expressed within Customer Reviews reflect each author's personal perspective and do not imply endorsement by MidwayUSA, its Employees or any other organization. Customers should in no way infer that MidwayUSA has validated review information as safe, accurate or appropriate.
Maglula UpLULA Pistol Magazine Loader and Unloader Polymer
Sale — Select ItemsAdd to Cart for Price
Glock Disassembly Tool
Lone Wolf Maritime Firing Pin Spring Cups Glock
Remington UMC Ammunition 45 ACP 230 Grain Full Metal Jacket
Clearance — Select Items$19.00 - $428.99Save up to $45.06 (20%)
Glock Magazine Loader 20, 21, 29, 30 Polymer Black
"How to Customize Your Glock: Step-by-Step Modifications You...
Beretta Magazine Beretta Nano 9mm 8-Round Stainless Steel
Sale$26.99 - $29.99Save up to $3.50 (10%)
Beretta Magazine Beretta 92, Cx4 Storm (with 92/96 Series...
Sale — Select Items$17.99 - $34.99Save up to $4.00 (12%)
Rainier LeadSafe Bullets 40 S&W, 10mm Auto (400 Diameter) 135...
$12.99 - $102.99
Wilson Combat Elite Tactical Magazine ETM with Base Pad 1911...
$33.99 - $34.99
Advanced Armament Co (AAC) Thread Protector HK USP Tactical 45...
Glock Magazine Gen 4 Glock 17, 19, 26, 34 9mm Luger 33-Round...
Sale$31.49Save $3.50 (10%)
Pro-Shot Benchrest Quality Pistol Bore Brush Bronze
$1.99 - $23.49
Pro-Shot Pistol Bore Cleaning Brush Nylon
Smith & Wesson Magazine S&W 59, 459, 659, 910, 915, 5903,...
Safariland 079 Double Magazine Pouch 1-3/4" Snap-On Glock 20,...
$26.49 - $29.99List Price: $33.00 - $39.00 Save up to $9.01 (23%)
Safariland 5199 Belt Clip Holster with Detent Springfield XD...
$27.20List Price: $34.00 Save up to $6.80 (20%)
Ruger Magazine Ruger SR9 9mm Luger Steel Blue