Magpul for the ar9 pccs - Magpul Industries PMAG D-50 GL9 PCC 9mm Luger 50 Round Pistol Magazine

Don't let the price push you away, it's honestly worth the money. This is my first 50 drum and i wanted to go with a reputable brand, magpul was the easy choice.. originally i scoffed at the price (OP has best retail price I've found so far). Some highlights to justify the price: Solid construction, reputable brand, high vis follower, loading lever that lightens spring tension, user serviceable (haven't tried it yet, but instructions seem pretty easy).
I have a quick cycling ARP in 9mm and with about 150 rounds through this drum mag hasn't missed a single chambering. It does what you pay it to do lol