4″ 1/2-28 TPI and 4″ tri lug with 1/2-28 TPI added to the list. These were developed primarily for the Copperhead but work with all Gen II/Gen III Platforms (all nfa rules apply) These are complete drop in ready units for any Gen II and “Gen III” MPX’s
Newer griffin tri lug mounts may not work with this tri lug assembly. Older Griffin and all other manufacturer products that are in spec are not an issue
Custom laser engraving available on barrels by request for an additional charge
Gen-2 MPX-type replacement Drop-in Barrel & Gas Block assembly:
Barrels are available in 4.5, 6.5″ and 8″ lengths, with 1/2-28 concentric threads for suppressor use. Thread protector is included.
You can also add a 1-peice HK-type 3-lug, machined directly onto the barrel.I do not accept returns on barrels due to liability and cannot sell them as new once they are shipped out and returned. If there is a function issue obviously I will make that right if it is due to my product.
There is no additional cost for shipping it is included in the price of all listed parts. If you would like special services for shipping such as insurance or signature confirmation please make an account on our site and contact us for a shipping quote. ILWT cannot be responsible for lost or mishandled shipments once they are dropped to USPS. If you checkout without requesting insurance your item will be sent with only the amount afforded by USPS for your particular shipment which may not be anything for small items and up to $100.00 for some priority packages. By placing the order you acknowledge and accept this.
Please use drop-down menu for barrel length and 3-lug option, when ordering.
We use the tightest of tolerances and highest quality control.
All barrels are gas-blocks are proudly made in the USA and engraved ILWT.
*As with any barrel swap, have a qualified gunsmith check head-spacing before firing.
DISCLAIMER: “MPX” is a federally registered trademark of SIG SAUER, Inc. and is one of many trademarks owned by SIG SAUER, Inc.
Neither ILWT, LLC nor this website are affiliated in any manner with, or otherwise endorsed by, SIG SAUER, Inc.
The use of “MPX” on this page is merely to advertise the sale of MPX type barrels, parts, or components.
4" 1/2-28 TPI Only, 4" tri lug with .5-28 tpi, 4.5" .5-28 tpi only, 4.5" tri lug with .5-28 tpi, 6.5" .5-28 tpi only, 6.5" tri lug with .5-28 tpi, 8" .5-28 tpi only, 8" tri lug with .5-28 tpi
Only logged in customers who have purchased this product may leave a review.
Returns and Exchanges
There are a few important things to keep in mind when returning a product you purchased.You can return unwanted items by post within 7 working days of receipt of your goods.Barrels may only be returned if they are unused and marked as returnable in description due to insurance and liability restrictions. If used or labelled as non returnable then repair/replacement only apply for function issues. .
- Only items that have been produced by us.Items manufactured by others will need to be addressed by the manufacturer
- Please ensure that the item you are returning is repackaged with all elements.