The Sig Sauer M400 TREAD is an optics ready, aluminum frame rifle. TREAD features a 16” stainless steel barrel with a free-floating M-LOK handguard, a single-stage polished/hard-coat trigger, ambidextrous controls, a Magpul™ SL-K 6 position telescoping stock, a mid-length gas system, and is available in 5.56 NATO.
I love this rifle! It looks and feels great, and is an absolute pleasure to shoot at the range. It is relatively lightweight with very little recoil. The target did not have a chance as I was able to group the shots within 1/2 inch at 30 yards using my Sig Romeo5. This is one fun gun. The only con I found is that the handguard gets extremely hot after shooting a hundred rounds. I received third-degree burns on my finger. I spoke to an experienced gunsmith and he advised this is common with Sig Sauer M400 rifles as the handguard is very thin, in conjunction with the Hornady ammunition used runs very hot. His suggestion was to wear gloves and buy a vertical grip... which I recently purchased. Regardless of this issue, it is a great, fun, and easy-to-use rifle that will bring years of enjoyment.