Metal construction, works great; get weaver cross lock rings or face screws on ejection side. - TANDEMKROSS Advantage Charging Handle and Picatinny Scope Base, Ruger 10/22

I was a little nervous after ordering this because at least one review said it was polymer and/or of poor quality; also, one review said the scope ring screws were in the way. I had none of those problems. I installed this (on an OEM receiver) , and it works great! The charging handle is made of metal, and the overall quality is sturdy (it's quite heavy and robust). So I'm not sure what the neg. review was talking about. It works well pulling on the aftermarket "PA Extended Fluted Charging Handle" I ordered from Acculite (formerly Whistle Pig), so this product works to engage aftermarket charging handles as well as OEM charging handles. I did mount my Vortex Hunter scope rings with the screws on the right (toward the ejection port) so they wouldn't interfere with the "Advantage Charging Handle and Picatinny Scope Base" (ACH&PSB), however. I COULD have mounted the screws facing the ACH&PSB and still operated it, depending on the scope & ring placement, but for the scope I selected, I needed to place the rings in a spot that would have interfered a little bit, so I flipped them to the ejection side. They are fine on that side and do not interfere with the extended charging handle (i.e. the "normal," non-ACH&PSB charging handle on the ejection port side). So, it's all good. It works great. It's sturdy and, TBH, my two range buddies kind of want one for their 10/22s also. haha. NOTE: If you're really worried about the scope ring screws impeding the function and don't want to mount the rings with the screws on the ejection side, then I recommend getting the "Weaver Cross Lock Rings" which don't have protruding screws: https://www.opticsplanet.com/weaver-cross-lock-rings.html?_iv_code=WR-RR-FACABB-49303
If I had it to do over again, I would have probably gotten these to eliminate protruding scope rings screws altogether. But, the way I have it set up, it's a minor issue.