*Remove the metal insert at the bottom before installation*
The TTI Base Pad for STI, SV, SPS, & Rescomp Magazine Tubes Use the TTI Base Pad with the TTI spring and TTI Follower for maximum capacity.
- This Patented push pin design is indestructible and will not come off until you are ready to remove it. One Piece construction made from solid aluminum, will not break or come loose, which is essential in the heat of competition. This base pad allows the magazine to be disassembled in seconds with one hand and no tools. You don’t have to worry about losing small parts or specialty tools to disassemble it.
- This product is used by World and National Pistol and 3-Gun Champions! Rob Leatham, Max Michel, Shane Cooley, Travis Tomasie, Blake Miquez, Jessie Duff, Nils Jonasson, Chris Tilley, JJ Ricaza, Manny Bragg, Shannon Smith, Daniel Horner, Keith Garcia, Mike Viogt, Maggie Reese, Dave Pruitt, Phil Strader, Mike Seeklander and Ron Avery, Bennie Cooley.
- Weighs .4 oz
*4mm (4 the Gauge) is recommended for anyone doing mag tuning who has a USPSA mag gauge.
- The 4mm is angled in the back and will fit the gauge while allowing one extra round over the 3mm. It’s the base pad that all the mag tuners have been waiting for to get that extra edge!
4mm for STI/SPS/Rescomp 140/170mm tubes.
· 20rds in 140mm 40S&W
· 24rds in 140mm 38/9mm.
· 29-30rds in 38/9mm
4G2 for all SV 140mm 40S&W old and new style tubes.
· Possible 21rds in 140mm 40S&W

Nice looking and strong base pads
Perfect fit on my 126mm STI magazines bringing 2 extra rounds +1 more with extra slim grams follower upgrading the original 9mm to 20 rounds versus 17 without tuning. Far more durable than the plastic original base pads
Added One Extra Round
Added one extra round to my STI magazine netting 22 + 1. It does fit in the EGW mag gauge. I am shooting open division, so I should have tried the 7mm first.
Great basepad
Taran makes a great product. The 4G basepads add extra rounds and stays within the 171mm range. They look good as well.
Awesome 5 star
Will buy it again perfect excellent product
Fantastic base pads
I started with Dawson precision-based pads but had to change them because of my new mag well. I bought these and wish I would have done so first. Super easy to work and clean mags. They also feel better in your hand when changing mags. On my mags they fit the mag gauge every time usually with room to spare.