These 80% 1911/2011 frames are designed and manufactured right here in the USA. They are all precision CNC machined from start to finish. They feature a full length dust cover with a tactical rail. Available in these ramp cuts Clark/Para barrel cut. -STI 2011 Compatible – Need to complete Hammer hole Sear hole Slide rails frames are to be completed by the purchaser obeying federal, state, and local laws.