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STI Magblock 10/20 (9mm) for 140mm Magazine

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Product code: STI_140mm_9mm_10_20

Availability: In stock

  • Buy 3 for $5.50 each and save 8%
  • Buy 10 for $4.95 each and save 17%

Quick Overview:

Magblock 10 Round Limiter for STI 140mm 20 Round 9mm Magazines

- Fits 20 round 9mm Factory STI 140 mm magazines. 
- Easy installation at the base of the spring.
- Limits the magazine to 10 rounds of 9mm. 
- Held in place with spring tension or can be epoxied for a permanent modification. 
- Lightweight, efficient design. 
- Made of a super strong, heat resistant, fiber reinforced polymer.


STI Magblock 10 Round Limiter for 140 mm 9mm 20 Round Magazines

This Magblock fits the STI 140 mm 20 round 9mm magazines and will limit them to 10 rounds.  Easily installed in seconds at the base of the spring. It is held in place with spring tension alone or can be epoxied if desired.

- Simple install to make 10/20 STI magazines. 

- No modification to the magazine is required.

- Lightweight and will not interfere with magazine reliability.

- Tested on factory STI 140 mm magazines as shown in the photos. The block may need to be modified to work with magazines from other manufactures or sizes

Additional Information

Custom design No

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