View Full Version : best lightweight free-float rail for Sig-556?

December 09, 2011, 08:08
Does anyone make a good lightweight free-float rail for the Sig-556? My Sig-556 Classic is already pretty heavy for a .223, so I do not want the common heavy aluminum 4-rail style. Ideal would be a rigid smooth low-profile float tube with holes for attaching small lengths of picatinny rail wherever I want. Such products exist for the AR-15, like the Samson Evolution (http://www.samson-mfg.com/ar-15_html/product/Evolution-9EX.html) rail, but I haven't found any yet for the Sig-556.

I want to use a Ching Sling or traditional loop shooting sling without worrying that barrel tension will change my point of impact. It'd also be nice to attach a small flashlight.

Although, hm, at least one experienced Sig-556 shooter (http://www.brianenos.com/forums/index.php?showtopic=102579&st=0&p=1169279&#entry1169279) is using the heavy non-free-float Troy BattleRail (http://store.troyind.com/SIG_556_Rifle_Rail_Black_p/srai-sig-r0bt-00.htm), and saw an accuracy improvement from the increased rigidity and/or changed barrel harmonics. That's not a crazy idea; some rifles with light barrels, like the older Mini-14s, are known to benefit from barrel-clamp devices like the Acccu-strut (http://accu-strut.com/).

What is your experience firing your Sig-556 with sling tension and/or with the handguards rested against various objects? Do you see point of impact shifts?

Btw, the factory handguards on my Sig-556 Classic rattle around a bit, which doesn't seem right. Is there a good way to fix that?

December 09, 2011, 08:10
For the curious, I also posted the same question (http://sigarms556.com/viewtopic.php?f=9&t=11647) on sigarms556.com, but I'm new there and not even sure I put it in the right forum.