After reading several threads about the Generation 4 Glocks, I thought that I would share with all of the GSSF/IPSC and other Glock Racegun users the changes that we are working on at B&B Enterprise (CARVER Mounts and Custom Parts) for the Glock Generation 4 Magwells : The Gen 4 Grip Plug area where our brass insert is inserted for attaching our CARVER Custom magwells is different that the Gen 1, 2 and 3 plug areas...................so we are working on a new design for the brass insert for the Gen 4. We'll offer our magwells for all Generation Glocks with a special version for the Gen 4 Compensators: Since all of our CARVER Custom Compensators have a relieved area for the guiderod to extend, modifications to all of our Compensators for the Gen 4 are in the works. The Gen 4 compensator will have the same relieved area but larger than our current version. We'll offer our Compensators for all Generation Glocks with a special version for the Gen 4. Trigger Kits: We are currently experimenting with changes made to the Gen 4, testing different methods to produce our 2.0 lb UL trigger kit utilizing all Glock parts and not skeletonizing any parts. Our results are pending. Guiderod: The new guiderod system will not work with reduced loads or compensated barrels because the system does not currently have an alternative to use a lighter spring with a captured or noncaptured guiderod. I have come up with a solution to this opportunity and we'll be testing the add-on that can be used with either a captured or noncaptured guiderod with the Gen 4 slide and its larger guiderod hole. I haven't shot the Gen 4 to compare to the recoil of a stock Gen 2 o 3. I'll be anxious to hear how everyone's opinion of the dual spring system works.