For use with the AR MAGLOCK only.
Used with the standard AR-15 kit to install on an AR-10, or use on wider than normal lower receivers.
Many AR-10/.308’s and carbon lowers are wider than MIL-SPEC AR-15’s, this is the kit you will need for those circumstances.
If you purchased the AR-10/.308 kit from us, you do NOT need this kit, the spacer and longer screw are already included.
This kit includes the spacer and screw only.