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28 July 2008, 11:34 #2
USGI A1
After the 3 prong FS used on the early M16s, the A1 FS (commonly called a birdcage) was in use up until the M16A2 was adopted by the US Military. The A1 FS remains on the market, and is a cheap option for those people who want a FS which does not have a closed section on the bottom. This unit does not need to be timed.
Last edited by Stickman; 31 July 2008 at 16:24.




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