Bushmaster Firearms

FAQ ID # 55
Last Update : 2008/04/16
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Question / Issue
How do I install an A2 Stock?

Answer / Solution

To install an A2 buttstock you need a minimum of a 5/8" open end wrench and a large flat bladed screwdriver. It is recommended to have a Lower Receiver Vise Block a 1/2" drive torque wrench and an Armorer's Wrench for the extension tube installation.

Install the buffer retaining spring and buffer retainer in the lower receiver. Thread the buffer extension tube into the receiver while pushing down on the buffer retainer until the extension tube rides over the buffer retainer to hold it in place. Torque the extension tube to 35-39 foot pounds. Install the take down pin, take down pin detent and take down detent spring into the lower receiver. Install the stock spacer onto the rear of the extension then slide the stock onto the buffer extension tube and carefully depress the takedown pin detent spring into the lower so it is not kinked. Install the A2 buttstock screw into the upper hole in the buttplate and tighten until the stock is tight on the receiver. The screw has a dab of Nylock thread locker on it so use a large screwdriver that fits the slot in the screw to keep it from getting damaged. Cock the hammer in the lower and slide the buffer and buffer spring into the stock extension.



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http://www.bushmaster.com/faqs/?f=55

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