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An insert for the lower receiver to reduce slop between the lower and upper.
Instead of using a squishy material like what's commercially available for similar products, the printed plastic is deformed to fit the receivers nearly perfectly.
LBRY Tags: 3d; print; ar15; shim; receiver
Instead of using a squishy material like what's commercially available for similar products, the printed plastic is deformed to fit the receivers nearly perfectly.
LBRY Tags: 3d; print; ar15; shim; receiver