Slide Models: P320 / P365 / P220 / P225 / P226 / P229 / M11-A1 / SP2022   This page is for non-optic-ready Sig slides, to upgrade your optic-ready Romeo1 cut Sig P320/P226/P229 slide to the RMR or Romeo1 Pro cut or add RMR holes to the Romeo1 Pro cut click here. To upgrade your P365 Romeo0 cut to the Trijicon RMRcc footprint click here. **Holosun 509t, Aimpoint Acro, and Steiner MPS optics cannot be directly milled to SIG P320 slides and will require the slide to be milled for the Sig optic ready pro cut and the use of an adapter plate. There is an additional charge of $69.95 for the adapter plate needed. **Some SIG P320 slides can't be milled for a red dot due to the weight reduction cuts inside the slide.  If we determine this is the case, we'll send your slide back at no charge to you. **SIG P365 slides can only be milled for micro red dots (Holosun 507k/EPS, Trijicon RMRcc, Shield RMsc, ETC.). **SIG P220/P225/P226/P229 slides cannot be directly milled for any optic due to the deep cavity for the safety plunger at the rear of the slide. The only option we offer on these slides is to mill our "cross" cut to the depth of the base of the rear sight dovetail and use our cross adaptor plate to mount the optic to the slide. The cross adaptor plate adds an additional $126.50 to the cost of the milling. ** Older West German Sig slides with a rectangular firing pin block cannot be milled for an optic or cross plate. Lead Times: 4 Weeks or less or your next milling is FREE! The clock starts the day we receive your slide.  The clock stops the moment we contact you to let you know your slide is done and ready to ship. We will not ship your slide until we have verified from you that your shipping address is correct. Excludes slides that require Black Nitride (we don’t do this in house) Excludes slides that require custom new BUIS sights or optics that are on backorder (we don’t make them and can’t control lead times) Welcome to the #boomsquad! Shipping instructions will be provided after your purchase.