This replacement part is a factory original from Sig Sauer. Factory replacement parts are manufactured to the exact same specifications and tolerances and use the same manufacturing materials as the original parts which guarantee excellent fit and reliable operation. Sig Factory .22 Caliber 10rd Black This is a 10-Round magazine for the Sig Sauer Mosquito chambered in 22LR. A genuine factory, the 10-round magazine helps to ensure maximum reliability from your Sig Sauer Mosquito .22 LR pistol. With an aluminum body for an ultra-smooth, spot weld-free seam for unimpaired follower movement. Self-lubricating follower and music wire spring provide effortless feeding. Slots insides allow fast visual inspection of remaining rounds. Lastly, this magazine has a removable floorplate for fast and easy cleaning. Aluminum Body .22 Long Rifle 10-Round Magazine Witness Holes For Each Round Ideal for Target Practice, Competition, or Recreational shooting Having a few extra factory magazines around is never a bad idea to save loading time at the range and serve as a backup for those days when you simply can’t remember where you put your primary magazine. You may be interested in our other Sig Sauer 22lr magazines! This Sig Sauer Mosquito Magazine is a Factory Original Replacement Part, manufactured to the exact same specifications and tolerances using the same materials as the OEM Magazine that came with the pistol, guaranteeing optimal fit and reliable operation.