Maintain an M4 or M4A1 Carbine Reviews
Summary – Assemble the M4 or M4A1 Carbine
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&pageText=To properly assemble the M4 or M4A1 carbine, you must:&
&bulletText1=Combine buttstock assembly and lower receiver&
&bulletText2=Collapse buttstock assembly to closed position&
&bulletText3=Combine buffer and action spring&
&bulletText4=Insert buffer into buttstock assembly&
&bulletText5=Replace extractor pin and spring&
&bulletText6=Insert bolt assembly into bolt carrier&
&bulletText7=Replace firing pin retaining pin and firing pin&
&bulletText8=Replace carrying handle assembly&
&bulletText9=Replace bolt carrier group and charging handle&
&bulletText10=Combine upper and lower receivers&
&bulletText11=Replace handguards&
&bulletText12=Replace sling&