This kit includes the correct Grams Engineering spring and follower along with a 140mm stainless steel spacer to correct feeding issues many users experience with these magazines. Each kit will include one spring, follower and spacer.

If you are using your OEM basepads, the stainless steel spacer will need to be shortened slightly to fit inside the magazine. The plastic magazine retainer will also need  to be shortened to accommodate the magazine spacer.