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OWNERS MANUAL – M14 / M21DMR / XM21 Rifle System
Tech Note 1 – What is the purpose of Bula Technical Notes?
Tech Note 2 – Milspec Rifles
Tech Note 3 – Ammunition Reliability
Tech Note 4 – The Effect of Ammunition on Rifle Function
Tech Note 5 – Centering of the Operating Rod to the Piston
Tech Note 6 – What to do if your Rifle Malfunctions
ar-15 parts online.
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