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
Next Level Armament NLA Sig Saure MPX/MCX 9mm Luger Barrel Adapter
$11.00 $10.99
View Product
Compare (0)
Most Helpful Negative Review Do not buy for MPX
Adapter does not fully clear the threads on a Sig MPX barrel, so a muzzle device cannot fully screw on the barrel. Not sure what barrel this will actually fit. Go with the Midwest Industries muzzle device collar adapter instead (MI-MPX9MMS).
Show
Sort by
Filter by

Not for MPX

by JLC369, Verified Owner from PA, United States Written on March 25, 2026
As other reviews have stated, this adapter covers most of the barrel threads on the MPX. I was only able to get about ½ turn of usable threads from my muzzle device.
Would recommend: No
Was it helpful to you? Yes | No

Sig MPX 9mm

by DR, Verified Owner from SD, United States Written on March 16, 2026
Did not fit my MPX. Took it to a friends machine shop and increased the diameter.
Would recommend: No
Was it helpful to you? Yes | No

Allows for a lot more muzzle device options.

by Jason, from VA, United States Written on April 22, 2025
If you don't want to deal with trying to track down a tapered muzzle device for your MPX, this thing is what you need. Does exactly what it's supposed to do. No POI shift, solid accuracy, and the bore alignment rod is directly in the center of my suppressor.
Pros:
  • inexpense and useful
  • Allows for a lot more options of muzzle devices
Cons:
  • None
Best Used for:
  • mpx
Would recommend: Yes
Was it helpful to you? Yes | No

way too small

by Ur Mum, Verified Owner from OR, United States Written on July 20, 2022
Not sure if these are actually for 1/2-28 or what, but they don't even come close to fitting 5/8-24. Doesn't even get over the end of my taper adapter, much less make it to the threads it would still have to clear to reach the taper.
Would recommend: No
0 of 1 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?