These extensions are designed to be used with spacer kits and BR based cartridges. With this spacer, there is no need to shim the back spacer up, it has material on the extension that holds the spacer up and in place.
Accuracy International AICS 10 rd magazine, tuned for smooth and reliable feeding. AICS Part# 3902...
The 6BR Magazine Conversion kits were designed to address the need for reliable feeding of...
Accuracy International AICS 5 round magazine, tuned for smooth and reliable feeding.