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Old April 15, 2013, 07:15 PM   #4
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Join Date: November 2, 2007
Location: Northern Orygun
Posts: 4,875
Lower hand guards were made by sub-contractors. Some used grooves, some did not. The grooved version is more common on Canadian and US made No4's but the Brit's did produce grooved lower hand guards. It's not a linear thing, just haphazard. Either smooth or grooved is considered correct.
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