This part is used in conjunction with pistons on firearms with fixed barrels such as rifles and submachine guns. This piece is used in place of the piston booster spring and is needed to use pistons on the Osprey 2.0.
Stock Notice: This item is NOT marked "In Stock". We will contact you within 12-24 hours by email if your order is on backorder with our distributor and will take longer than the 5-7 business days it takes us to ship out. Please do not order if you need this item shipped immediately.