OK..I have a Gen 3 model 23 and just purchased and Gen 4 Model 22. I upgraded my Guide and spring in the Gen 3 and Installed a Buffer. Has anyone upgrded their Gen 4? Also comparing the 2, aside from the Guide and Spring assemble, is a courios little bump on the trigger slide mechanism. Does anyone know why that was done?
Barrell 4150 Steel Preferred
Chrome Lined Chamber and Bore
5.56 Nato Chamber
Parkerized under Front Site
M4 Feed Ramps
Magnetic Particle Tested
Stmped on Barrel " C MP 5.56 NATO 1/7"
Gas System "Mid Length"
Buffer "H" Style
Front Site Block should be "F" Marked
Make sure the Gas Key staking is Propper