Magazine Extension for МР-133, МР-153, МР-155, Remington Spartan SPR 453
Adds +3 round
Extension kit includes tube extension, follower, clamp with picatinny rail and spring
Important! Magazine spring has maximum length 1300 cm (511 inch). You will need to cut it if you going to install for extensions up to 5 round or if it doesn’t work properly.
Made in Ukraine