GO BIG! PCC shooters, we were listening when you asked us for more! Our new +20 (51+1) kit isn’t just more capacity, it’s more strength, more durability, more features, and easier to clean — at a very competitive price! If you want “pro-level” equipment for PCC, you can’t do better than this! Wield 51+1 rounds from your Glock pistol-caliber carbine! Unprecedented strength: rigid design absorbs abuse and hard knocks. We can STAND ON IT! Quick-release base allows for easy cleaning (without taking the mag apart) "Sword-like" grip provides positive control when inserting -- you won't slip in a critical moment! Includes custom super-length spring. NOTE: Because of a combination of factors, we build our basepads slightly "short" for best reliability. As a result, they will run properly with ammunition loaded to 1.125" overall or less. That's a typical length for 115- and 124-grain loads, but some (notably, Winchester 115 RN) will go out all the way to 1.160". HINT: If your extension will take 35 rounds and then becomes unreliable (or sticks), check the length of your ammunition!