About The Author
Patrick Sweeney is a certified master gunsmith and armorer instructor for police departments nationwide. He is author of many Gun Digest books, including Gun Digest Book of the 1911 Vols. 1 and 2; Gun Digest Book of the Glock Vols. 1 and 2; Gun Digest Book of the AR-15 Vols. 1, 2, 3 and 4; Gunsmithing: Rifles, Gunsmithing: Pistols & Revolvers 1 and 2; and Gunsmithing the AR-15 Vols. 1 and 2.
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