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Is there a difference in the bolt carrier assembly between a AR-15 and the M-16?
I have purchased two used, legal, semi auto AR's but the guts in one looks different. There is something "clamped" on to the bolt carrier assembly and is slid forward enough that the hammer hits it when fired and will not continue to the firing pin until I pull the charging handle.?? Anyone have a clue, cause I dont! Thanks in advance Phil
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