The pin set screws are set with Loctite® at the specific tension we recommend, and will generally never need an adjustment. Tightening the base pad screw is not recommended and may be difficult because the screw is set with Loctite®; trying to force the set screw to turn could result in stripping the screw. We do not warranty base pads for stripped heads on set screws or pins lost in result of tampering with the set screw.

*Not for sale to California and Washington residents. A courtesy email will be sent to CA/WA residents who place an order for a base pad that has the capability of taking a magazine past ten rounds. Ultimately a refund will be issued unless the purchaser is active Law Enforcement. CA/WA civilians can only purchase base pads listed on the following link - https://tarantacticalinnovations.com/magazine-extensions/california-compliant/

3mm:

The 3mm is our low-profile extension for the Staccato/Springfield Prodigy/Atlas/Infinity 9/38 2011 style magazine. Leaving in the factory spring and follower it will be a +1 on a 126, 140 and 170mm magazine. Although it will work on all 2011 magazines, its recommended as a low-profile pad for the 126 magazine to bump it from 17 to 18 rounds. And for the 170mm competition magazine big sticks it bumps it from 26 to 27. If you use our competition thin follower and extra power 13 coil spring it bumps it to 29 and still fits the 170mm USPSA gauge (but will not slide lock on last round fired).

4mm:

The 4mm is our mid profile extension for the Staccato/Infinity/Springfield Prodigy/Atlas/Infinity 9/38 2011 style magazine. Although it will work on all 2011 style magazines, it is recommended for the 140mm magazine. It brings the capacity up from 20 rounds to 22 rounds with the factory spring and follower and still fits the USPSA 140mm gauge. If you want even more added capacity use our thin competition follower and extra power 11 coil spring to bump the capacity up to 23 rounds (but will not lock the slide to the rear on the last round fired).

7mm:

Compatible with Bul Armory SAS II Pistols

The 7mm is our longest extension for the Staccato/Infinity/Springfield Prodigy/Atlas/Infinity/MBX 9/38 2011 style magazine. Although it will work with all 2011 style magazines it is recommended for the 140mm Magazines for Open/Unlimited division and the 126mm because that’s what John Wick will do. On the 140mm magazine, the 7mm extension bumps the capacity from 20 rounds to 22 rounds with the factory spring and follower. For even more added capacity, use our thin competition follower and extra power 11 coil spring for an impressive 24 round capacity (but will not lock the slide to the rear on the last round fired).

For the Infinity Magazines:

Our base pads will fit all the Infinity magazines and every generation.

• 9mm/38 – Recommendations for competition magazine guidelines: You must use the 3mm extension with your 140mm magazine tubes in order to fit the 140mm gauge. Using our thin competition follower and 11 coil extra power spring you’ll get 23+1 capacity.
• For Unlimited Division, we recommend the 170mm, the same 3mm extension must be used with our thin competition follower and 13 coil extra power spring to get 29+1 rounds and still fit the USPSA 170mm Gauge.
• Using a 140mm Magazine with our 7mm extension and our thin competition follower and 11 coil extra power spring will bump the capacity to 24+1. Recommended for the Unlimited Division.
• If you’re not buying any of this for competition, you can mix and match any of these magazines and pads for different endless combinations.
• .40SW – Recommendations for competition magazine guidelines: You must use the 3mm extension with your 140mm magazine tubes in order to fit the 140mm gauge. Using our thin competition follower and 11 coil extra power spring you’ll get 21+1 capacity.

For the .40 Magazines:

• Staccato Magazines: without changing the spring and follower using our 4mm base pad will bump the capacity from 18 to 20 rounds and fit the 140mm USPSA gauge for limited. With our thin competition follower and 11 coil extra power spring it will hold 21 rounds. (but will not lock the slide to the rear on the last round fired
• Infinity: 140mm .40SW Magazines, the 3mm base pad and our thin competition follower and 11 coil extra power spring it will hold 21 rounds and still fit the 140mm gauge for USPSA/limited division. (but will not lock the slide to the rear on the last round fired
• Atlas Magazines: Using our 4mm base pad will allow the magazine to hold 18 rounds with the factory spring and follower. With our thin competition follower and 11 coil extra power spring it will bump the capacity from 18 rounds to 20 rounds. (but will not lock the slide to the rear on the last round fired).

*Due to the variances in mag tube dimensions from different companies and even different generations of mags from the same company, the base pad may require minor fitting to the tube and the back of the lips may need the sharp edges buffed down so the mag will fit the gauge.*