I have three of these extensions and they've been great. The guy who makes them is local and a lot of my friends also use his mag extensions, bolt knobs, and chamber flags.
I have three of these extensions and they've been great. The guy who makes them is local and a lot of my friends also use his mag extensions, bolt knobs, and chamber flags.
I have 2 of these JKL sitting here and were the first 455 mag extensions I purchased. They attach to the mag fine but did not increase my round count. Still only allowed 10rd in the mag... This caused me to search further and found the BLAMM which function 100% out of the box with no mods or feeding/loading issues. Last ones I got where the MK extensions. They also wouldnt allow more than 10rd in the mag out of the box but after working with MK and sending them back with my mags, they now hold 12rd.
Im currently running 2 10rd BLAMM and 2 10rd MK weekly without issue. The JKL linked above have been sitting on the bench here for a while.
Here's a 10rd in my MDT ACC 455 with the MK extension. Makes mag changes and positive grip much easier with an extension on the 10rd mags.
I did read your post above and saw that it only allowed 10 rds. in the mag. I wondered what might be causing that problem, as all 5 cz 455 mags i have installed them on have been able to hold 12 rounds and have functioned flawlessly.