engineerbrian
JMB fan club
We found a great new AR15 mag block that actually works well, its from Stern Defense. It comes in 9mm, 40 cal, and 45acp with Glock mags, M&P mags and Beretta 92 mags. They can easily convert your Colt bolt to accept Glock mags for less than $10 if your interested in that too
https://getstern.com
https://www.youtube.com/watch?v=dluSvSk3vi0
https://getstern.com
https://www.youtube.com/watch?v=dluSvSk3vi0