This kit will upgrade your S2 to an E2 spec Joint Rifle.
You purchased an S2 Joint Rifle and now you want to upgrade it to an E2. This kit includes all of the enhanced features found on the E2. All new E2 parts should be installed by a competent gunsmith.
Two-Stage Enhanced Trigger group
Ambidextrous Selector Switch
Battery Assist Device Lever
MAGPUL MOE Grip
Enlarged Trigger Guard
All fire controls should be be installed by a competent gunsmith.