Frequently Asked Questions


Which magazine do I need for my 1911 style pistol?

What do the magazine part numbers mean?

Is it bad on the spring to leave magazines loaded?

When do I need to change springs?

Do you have to leave Tripp Magazines loaded before you can use them?

Why won't the slide stop drop on an empty magazine?

Do I need an Alloy Basepad?

What does “Custom Shop” (CS) mean?

What is the best way to contact Tripp Research?

What makes Tripp CobraMag's the best?




Which magazine do I need for my 1911 style pistol? (FAQ Menu)
-There are 3 factors in determining which magazines will work with your pistol; pistol grip length, caliber, and round count.
1911 pistol grip length can be identified by measuring the distance between the grip screws, center to center. Government/Commander/Full sized pistols will measure 3 1/8" inches while Officers/Compact pistols will measure 2 5/8" inches (see diagram).
Once you know the pistol size, select the proper caliber and round count. Round count is primarily a matter of preference, but higher round count magazines are longer and will extend further out of the pistol magwell.

What do the magazine part numbers mean? (FAQ Menu)
-Each magazine has a unique part number which identifies the round count, caliber, whether it has a removable basepad or welded flush floorplate, and whether it's for an Officer or Government grip length pistol. For example, the 8R-45-RG is an 8 round .45 caliber, removable basepad magazine for Government length pistols (see diagram).

Is it bad on the spring to leave magazines loaded? (FAQ Menu)
-No, or "not really" is the correct answer. We have Law Enforcement Officers, conceal carry shooters, and people with bedside pistols leave magazines loaded for long periods of time with no issues. Springs will show the most fatigue from loading/unloading but leaving them compressed doesn't affect the spring as much as people tend to think. While we do suggest you test fire magazines regularly, leaving Tripp magazines loaded is not a problem.

When do I need to change springs? (FAQ Menu)
-The simplest answer is when they start having jams on the last round, or fail to lock the slide back. This is when the spring is fully extended and at its weakest. There are some pro-active methods to changing springs so you never have a failure from spring weakening. The easiest way is to take a new spring and use it as a size gauge against springs that are in use and you will notice the used springs will shrink over time. The down and dirty way is to just watch them "shrink in coils" and when they lose a whole coil in height, swap them out for new springs. Most pistols will still shoot just fine with springs that have lost 2 coils in height, and some pistols 3 coils in height. If you want something a little more hands on, you can take a starting measurement and a failure measurement and decide on where you want to change yours.

Do you have to leave Tripp Magazines loaded before you can use them? (FAQ Menu)
-Our Magazines are ready to use right out of the package. You don't need to leave ours loaded "over the weekend" before using them. We properly spring our magazines and give our springs a set before we sell them.

Why won't the slide stop drop on an empty magazine? (FAQ Menu)
-All of our followers have a "front skirt" on them which just means there are pieces of material or "skirts" that go down from the follower in the front and back. This makes our followers "anti-tilt" so they will resist rotation. When a follower engages the slide stop moving upwards it will make contact in the front of the follower. This action wants to push the follower down but its job is to resist this and push the slide stop up and lock back the slide when there are no rounds left in the magazine. Our followers resist being pushed down in the front so they can have a solid upwards push to lock back an empty slide. This means that when the magazine is empty and supposed to hold the slide stop up, it's hard to push it down to release the slide. If you have any rounds in the magazine there is no problem releasing the slide.

Do I need an Alloy Basepad? (FAQ Menu)
-The Alloy Basepad is primarily a cosmetic upgrade. It is slightly heavier, but for most shooters we suggest the Polymer/stock basepad.

What does (CS) “Custom Shop” mean? (FAQ Menu)
-In order to provide a variety of different magazine options for both government and officer grip length pistols, some magazines are customized. For instance government length magazines can be cut shorter for use in officer sized pistols. Note: Due to Custom Shop customization, the imprinted part number on the side of the magazine may not be accurate.

What is the best way to contact Tripp Research? (FAQ Menu)
-You can contact us by email or phone and we will typically respond in the same manner.

What makes Tripp CobraMag's the best? (FAQ Menu)
-The best combination of features:

  • Proper internal tube volume at all capacities and calibers.
  • Properly spring the magazines for a long reliable life span.
  • Anti-tilt followers for positive lock back every time.
  • Properly heat-treated magazine tubes that have feed lips that don't crack.
  • An attractive outside finish and design.