I went out to test my new QC10 SBR with the 9mm MVB industries stock attached and the BFS Franklin armory trigger. I had a few problems. The upper is a matrix side charger and I kept having the spent 9mm cases somehow getting up behind the bolt. This happened several times but seemed to stop once the I ran around 40 rounds through the upper. After that I was using the binary mode and I broke the bolt catch and the buffer somehow is now stuck inside part of the tube with the springs. I was shooting with a YHM Wraith XL when the buffer and springs were compressed into the tube. This thing scares me! It has two springs and the buffer compressed into this little tube. Any ideas on how to get it out and why this happened? I did use one SS 1" (ground to fit) washer for a short spacer but that should not have caused all this should it? I will list spec of the rifle below:
QC10 Colt lower 9mm
MVB Industries 9mm ACR stock kit with 9mm buffer (5.3 buffer) and springs
Franklin armory BFS trigger
Cmmg Bolt (ramped and modified for BFS trigger) (weight 14.7 oz)
Matrix arms side charging upper
7.5 Wilson arms SS barrel
Striker industries bolt catch
Ammo used White box winchester 9mm and monach steel cased 9mm. The stock/buffer problem happened with the white box
I am going to contact MVB industries and show them photos later today. By the way when the rifle did work in binary mode it was awesome!!