Early G3 builds, notably those using the old school FMP style cocking tube lack a hanger to properly secure and mount a handguard. Utilizing a shim can push the handguard forward to meet up with the base of the front sight post and better secure it. Print in TPU or filled Nylon.
LBRY Tags: g3 handguard shim; g3; 3d printing; handguard shim; fmp