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80% Glock-Compatible Pistol Frames

There has been a surge of interest in the past few years in shooters buying AR-15 lower receivers that are 80-percent finished, and then doing the final milling themselves. At SHOT Show, a company called Polymer80, known for its approach to 80% frames and full “do-it-yourself” rifle builds, showed the industry’s first 80% polymer pistol frame. Aptly named the “Spectre,” …