Maintain an M4 or M4A1 Carbine Reviews
Inspect Lower Receiver Group
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&pageText=To inspect the lower receiver group of the M4/M4A1 carbine for serviceability, these components must be inspected:&
&label1=Trigger mechanism&
&label2=Bolt catch&
&label3=Magazine release button&
&label4=Buttstock assembly&
&label5=Action spring and buffer&
&popText1=Start by checking the trigger mechanism for missing or damaged parts.&
&popText2=Check the bolt catch for free movement. &
&popText3=Check the magazine release button for free movement.&
&popText4=Check the buttstock assembly for dents and rust and ensure the proper operation of the retaining nut and lock-release lever.&
&popText5=Check the action spring and buffer for damage.&