Reviews & Ratings for Fostech MACH-2 AR-15 Tactical Rail — 7 reviews — Page 1

Overall a. goid lightweight handguard. My only gripe is they didn't include or mention the barrel nut wrench needed. 1-1/8 is what you will need

If you are looking for a light weight handguard this is it. It's made from magnesium aluminum alloy so it's very lightweight. It's not as pricey as other named brands but it feels sturdy when c-grip.

Really nice fit and super light …. I love the top rail design.

Okay so I'm going for a Light weight build and needed a good handguard that was at least 11" and under 1oz per inch.

Most everything I found in this category was over 200 and even closer to 300, which is wild for what it is (extruded aluminium) or in this case a magnesium/aluminum alloy.

I first ordered the 10 inch, but it wasnt quite long enough to cover a mid length gas system so I got the 13".

One reviewer here (and on reddit) claims the guard moves around in use and he stripped out the threads because the design has the clamp screwing into the magnesium itself, which can't take much torque before stripping. Even the instructions say hand tight only.

I knew all this before purchasing so I got some measurements.

The barrel nut itself it's actually an interference fit. 1.39" and the hand guard itself it is 1.37" so not a lot of torque is needed to hold it to the nut itself. The screw that keeps the guard from moving forward is comically small, but Im assuming this is for weight savings as you could fit a much larger screw into the groove on the barrel nut itself.

So the solution is easy.
Add green loctite 620 (retaining compound) to the outside of the barrel nut before pressing the hand guard into place. Let it cure for 24 hours and I promise you it's not moving without some serious heat applied to that barrel nut.

While it's curing degrease your screws and add blue loctite then get them hand tight.

Id suggest having your rail accessories planned out in advance so y...
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My favorite rail by far. Light and feels great. I will be getting another one.

This handguard is one of the lightest on the market. Even lighter than some carbon fiber handguards while being a lot lower cost. The machining is not exactly impeccable. I haven't broken or damaged it yet, but I haven't dropped or beaten it up yet. So far so good.

Fit and finish is awesome. I own both the 7" and the 13" version of these handguards, and i cant recommend either.

The 13" model weighs less than 6 oz WITH the barrel nut... crazy light. Id compare it to a par towel tube... it feels that light. That said, also feels very strong and i dont doubt the material.

Unfortunately the problem lies in the connection between the handguard and the barrel nut. The nut is machined smooth and doesnt provide enough friction to keep the HG in olace during rapid fire.

Both my 7" and my 13" have slipped on the barrel nut during use. The 7" was factory installed on ny Fostech Tomcat, the 13" was installed to spec by myself. Both eventually worked themselves loose.

I would love this product alongside their magalloy recievers if they simply put some knurling or some sort of friction inducing texture on the nut to grip the inside of the HG. Until then, I cannot recommend.

Ill be returning both to fostech for their (lengthy) warranty process. Unfortunately in a desparstr attempt to get one to properly sit on the nut, i overtorqued and stripped a mounting hole.

Great product, just needs revision. Ill let them know. Will be switching to the Aero Atlas S One for a proper handguard mlunt on a relatively ljghtweight HG.