Purchased in 9mm for home defense, I can not be more pleased with my purchase of the CX4. I added a folding fore stock grip, a Sig Sauer rail mount laser, and a tactical light. Add another charging handle and the barrel shroud. The Bushnell Trophy optic completes the package. The thirty round magazines are more than adequate. Almost no recoil, Wonderful accuracy to 100 m, and almost no recoil. Easy to accessorize, and very ergonomic. Need I say more?