These are a higher end gear. 13:1 ratio gears are applied when seeking a high ROF (rate of fire) build. *please note your blaster model in purchase/cart notes. Brands may vary from time to time but the quality will remain high end. These do not come with pinion gear or anti reverse latch.
This switch assembly is a full heat resistant replacement for the stock M4 Wells and Gen 9. It also includes the Cooper terminals and screw down plates which is often not included in most other aftermarket switch assemblies