The famous Polymer 80 jig is back.
Polymer80 helped make finishing your 80% lower easier than ever, thanks to its universal 80% jig made for AR-15 receiver blanks. This polymer jig includes the needed bits and end mills to finish any mil-spec receiver. P80's jigs were originally made to work with their propriety polymer lowers, but their AR-15 jig also provides guidance for completing aluminum (billet or forged) lowers.
Fabricating polymer is easier than machining aluminum. The material is easier to cut and drill, and the raw receiver blanks are typically more affordable than their billet or forged counterparts. Although P80 jigs are considered disposable, they can be reused to complete multiple blanks if care is taken to preserve the drilling and milling guides.
To complete your polymer AR-type lower with the RJ556U Jig, we recommend using a drill press with an appropriate work-holding vise. Calipers should be used to confirm milling depths, and basic round and flat files should be used to clean up rough edges after initial fabrication.
Contrary to federal law, some states have either restricted or banned the sale, transfer, and ownership of 80% lowers, firearm blanks, and other gun parts. Because of these restrictions, we cannot ship our products to certain states. Please confirm whether your state is restricted on our Shipping & Return Policy before placing an order. We cannot fulfill orders to restricted states if placed.
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