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Posted: 10/25/2007 8:32:55 AM EDT
| How can an 18" midlength SPR barrel have the same sight radius as a 20" barrel? Does it use the same length gas tube as a a rifle length system, but just a shorter barrel? I don't quite understand it. Can anybody shed some light on the subject? Thanks. MJD |
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I measured the length of my gas tube and it reads 15" from the pin to the end of the tube. Is that longer than a rifle length/same/shorter? The reason I was asking this question was to choose the proper length float tube for my build. *edit* I was going to use a low profile gas block, but I've changed my mind. I now intend to use the windage adjustable front sight base that came with the barrel. My barrel has flats machined into the sides and bottom to accomodate the FSB. Plus, it'll save me well over $100 by not using a front flip up and gas block. MJD *edit 2*- Here's a picture of the barrel with tape measure for comparison. It's (supposed to be) a midlength 18" White Oak SPR barrel, but it's got 12" of space between the receiver and the FSB. Isn't a midlength only 10"? I'm wondering if I have an SPR-R barrel. MJD 
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Well, looks like I have an SPRR then. There is clearly 12" between the FSB and the receiver. I suppose I could get a 13.2" rail and low profile gas block, but that seems a bit silly. If I can't fit everything in 12" of space, shame on me. MJD |
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