The FAB Defence TZ-M4 allows staggered coupling of a pair of M4 / USGI metal magazines for rapid reloads.
Staggered magazines allow the lower mag to sit will clear of the ejection port when using the second magazine.
Made from a tough polymer they are durable, lightweight and easy to fit. The mags slide snugly into the holders and are held in place with a bottom catch which locks into USGI magazine bases.
- USGI Aluminium magazines
- Galil 5.56 magazines
- Surefeed magazines
Limited function with:
- HK steel magazines (HK416 / L85) (will take mag as friction fit but locking catch won't engage)
- Black Dog magazines (will take mag as friction fit but locking catch won't engage)
Will not fit:
- Magpul PMAGs (too wide to fit)
- Polymer magazines with bases wider than the mag body (too wide to fit)