measure carefully, and don't use with vortex helical FH

You better do some serious measuring before trying this.<br><br>Handguard: If your free float handguard is 15 inches, it may not fit. I did not count on the fact that it actually sits lower (closer to the breech) than the closest to breech threads, by at least 1/4". Didn't fit that gun.<br><br>Timing: If you have a flash hider that needs to sit at a particular position relative to 12 o'clock, timing is I think the term, beware that with or without the crush washer you may not be able to get the timing to work. This is what I found with a standard A2 FH. <br><br>Length issues: I tried this with a vortex helical FH, specifically so I would not have to worry about timing, but it stuck out the end a bit. That would have been OK, but...<br><br>Sound issues: The vortex helical FH used has a tuning fork affect - makes noise. This is a vortex issue, but the Indian Creek thing seemed to amplify it (harmonics?? who knows). <br><br>3 star is for nice workmanship, o/w useless to me.