FREE SHIPPING & FREE RETURNS*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Midwest Industries SIG 516 Extended Free Float M-LOK Handguard
$194.95 $183.95 Save $11.00
View Product
Compare (0)
Most Helpful Positive Review Nice, different than factory
I own a few Sig516 uppers and rifle, and wanted to try this out. I am a fan of the quad rail that comes with it, but the weight is a factor. This went right on, super easy swap, five minutes or less. Looks great, and gives you the Mlok options with a nice weight reduction versus factory quad rail, especially if you have no use for the side rails. Still like the quad rail, but this is definitely different and an upgrade in the sense of weight reduction and a more current look.
Show
Sort by
Filter by

great product without breaking the bank

by Jamie, Verified Owner from TX, United States Written on March 24, 2025
Rail is very rigid and lightweight. Love the styling as it almost changes the entire look of the firearm from the stock rail. Fits bayonet lug gasblock and lugless block.
Would recommend: Yes
Was it helpful to you? Yes | No

M-LOK Handguard Replacement

by tradermacher, Verified Owner from CA, United States Written on February 11, 2025
Ordered this based on reviews I saw on reddit. Great quality construction, lightweight and perfect fit. Much more comfortable than the stock quad picatinny.
Would recommend: Yes
Was it helpful to you? Yes | No

Great Add-On !

by straight shooter, Verified Owner from CA, United States Written on February 2, 2025
Outstanding upgrade to the Sig Sauer 516 Patrol piston AR-15 rifle. It fits perfectly and is tailor-made for the Sig 516. Easy to install. Thanks to its superior M-Lok design, it is much lighter and slimmer than the bulky and heavy factory quad Picatinny rails. I highly recommend it for the Sig Sauer 516 rifle!
Best Used for:
  • Sig Sauer 516 Patrol piston AR-15 rifle
Would recommend: Yes
Was it helpful to you? Yes | No

Bring your Sig 516 from 2010 to 2014

by Devon Iwanicki, Verified Owner from NV, United States Written on February 1, 2025
Having suffered with the stock picatinny rail and the trial and error of the lancer carbon handguard this is pretty much the only handguard to get for your sig516 should you choose to continue using this abandoned firearm platform.
Funny enough the lancer full length actually weighs more than the picatinny version.
So you're stuck with a short rail probably the lightest one for this platform that actually makes it feel like a modern AR instead of a big clunky mess the lockup method not confidence inspiring but gets the job done. There's no heat shielding so you'll want to get some rail covers as far as mounting lights and everything I definitely have a gripe with the forced use of a QD cup on the end of the handguard where I would want to mount a light as far forward as I could.
The finish is not as robust as the Sig sauers on the receiver but once you attach some accessories rattle can this thing you'll never notice.

It's either this or go the custom route like some guy on AR15.com did by changing out the barrel nut with a GI and doing some trimming to make a Centurion rail work.
Would recommend: Yes
Was it helpful to you? Yes | No

Nice Upgrade

by wolfman, Verified Owner from NC, United States Written on April 21, 2024
This M-Lok rail is a nice improvement over the stock rail. It covers the sides of the gas block and gives the 516 a more modern look. Fit and finish is perfect and was very easy to install.
Pros:
  • Modern and sleek look
Cons:
  • None
Best Used for:
  • All purpose
Would recommend: Yes
1 of 1 found the following review helpful.
Was it helpful to you? Yes | No

A great replacement handguard

by Deuce, from TX, United States Written on August 30, 2023
The handguard is lighter than the original handguard and makes it look a little more modern. The look and modularity are nice and allow you to still clean the piston easily. Also it fits rifles with the bayonet lug.
Would recommend: Yes
1 of 1 found the following review helpful.
Was it helpful to you? Yes | No

Midwest handgaurd

by Jdavis223, from TX, United States Written on October 23, 2022
I absolutely love this handgaurd!!! The ergonomics has changed it for the best. Quality is definitely good. Took the factory one off and bolted the new one one very easy. Looks like it belongs once applied.
Would recommend: Yes
2 of 2 found the following review helpful.
Was it helpful to you? Yes | No
There are no reviews that match your criteria. Would you like to review this product?