ATF Opinion Letter AK-Type Receiver Flat with Engravings 12.9.2005
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ATF Opinion Letter AK-Type Receiver Flat with Template 11.2.2011
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ATF Rul. 81-4 AR15 Auto Sear is Machinegun
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ATF Intelligence Bulletin 21-01 Swift Link AR-Type Machinegun Conversion Device Update - Unclassified, Law Enforcement Sensitive
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ATF Response to GOA GOF FOIA 2021-0453 8.5.2022
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ATF Opinion Letter STEN Sub-Machinegun Receiver with Template 12.11.1986
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ATF ATF National Firearms Act Handbook - Chapter 2 What are "Firearms" Under the NFA?
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