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One Piece Mcfarland Style Gas Ring
1 Piece McFarland Style Gas Ring for MPX Gas Valve/Plug
Replacement part for your worn/damaged ring that is designed for your gas plug/valve.  This will work with factory or our replacement plugs.  Perfect for spares...
$14.00 Add to cart
1908 Colt Vest Pocket 25 ACP Threaded- Barrel
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1908 Colt Vest Pocket 25 ACP Threaded-Barrel 1/2-28
Threaded direct replacement barrel for The Classic Colt 1908 .25 Vest Pocket – 4140 Chrome Moly steel construction – 1:9.8 Twist rate. – 1/2 x 28tpi...
$225.00 Add to cart
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Adjustable Gas Plug for MPX
Replacement inserts for the short plug with the 5 settings now available as standalone parts and will utilize the existing sleeve and nut from your...
$10.00 – $110.00 Select options This product has multiple variants. The options may be chosen on the product page
In Lead We Trust Barrel Nut Compact Torque Key
Barrel Nut Compact Torque Key
Compact wrench to ensure correct torque specs every time when installing your barrel.  The wrenches are pre set and simply cam over when proper torque...
$28.00 – $33.00 Select options This product has multiple variants. The options may be chosen on the product page
In Lead We Trust Gas Rings For MPX Gas Piston
Gas rings for MPX Gas Piston/Tappet
High quality rings to replace your worn/damaged  rings on your gas piston/tappet.  Great for spare, comes in a 9 pack good for three full replacements....
$12.00 Add to cart
In Lead We Trust MPX Open Gas Plug
MPX “OPEN” Gas Plug
No restriction gas plug for the mpx platform similar to what the new Gen II MPX’s are shipping from the factory with There is no...
$40.00 Add to cart
In Lead We Trust MPX Barrel Screws
MPX barrel screws
Be aware their are two different screw head diameters on the mpx. Gen I and early Gen II use a .357 diameter head while later...
$16.00 Select options This product has multiple variants. The options may be chosen on the product page
MPX Extractor Pin Replacement Package Of 5
MPX Extractor Pin Replacement PKG of 5
Shock resistant steel heat treated, peened and blued (picture shows unfinished part, production parts will be blue).  Factory units shear often great to have replacements...
$26.00 Add to cart
MPX Extractor Springs And Insert
MPX Extractor Springs and Insert
Replacement for the MPX Extractor Springs, pack of 5. “Donuts” also come in a pkg of 5 Also available on the drop down menu is...
$10.00 – $30.00 Select options This product has multiple variants. The options may be chosen on the product page
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Engraving service
Two line text engraving on barrel. Please include text you would like engraved in the notes section of the order.  If you are wanting to...
$10.00 Add to cart
Gas Port Enlargement Service
We can open the gas port on your factory barrel assembly an extension for more reliable function.  Please place in comments size desired, .052, .054,...
$60.00 – $90.00 Select options This product has multiple variants. The options may be chosen on the product page
Gen II And III IIWT MPX Type Carbine Barrels With Gas Block
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Gen II / Gen III ILWT MPX-type ‘CARBINE’ Barrels w/Gasblock
Back in stock as of December 13, 2024 Add a Factory Sig MPX PCC 16″ hand guard for an extra $50.00 while supplies last with...
$40.00 – $695.00 Select options This product has multiple variants. The options may be chosen on the product page
Hk Style Three Lug Suppressor Adapter
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HK “NAVY” Style 3-Lug Suppressor adapter w 1/2-28 muzzle
griffin tri lug mounts may not work with this tri lug assembly. other manufacturer products that are in spec are not an issue. I have...
$55.00 – $70.00 Select options This product has multiple variants. The options may be chosen on the product page
Hk Style Three Lug Suppressor Adapter
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HK Style 3-Lug Suppressor adapter
13.5 x 1 LH specifically made for MPX Type Tapered Barrels now available in drop down. Does not require taper ring! Newer griffin tri lug...
$46.00 – $65.00 Select options This product has multiple variants. The options may be chosen on the product page
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HK Style Extended Base 3-Lug Suppressor adapter. “Navy”
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...
$65.00 Select options This product has multiple variants. The options may be chosen on the product page
In Lead We Trust MPX Armorers Block
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MPX Armorers Block
We were asked to bring this back so we obliged.  This block is very helpful when removing the barrel retaining and detent pins.  This locks...
$60.00 – $75.00 Select options This product has multiple variants. The options may be chosen on the product page
In Lead We Trust MPX Spare Parts Kit
MPX Spare Parts Kit
Parts kit does not come with barrel screws and nuts, or springs (unless ordered that way via drop down)pic is for reference only. Exact contents...
$145.00 – $230.00 Select options This product has multiple variants. The options may be chosen on the product page
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In Lead We Trust MPX Vice Block
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MPX Vice Block
Machined aluminum or delrin vice block to secure your mpx lower while doing maintenance, trigger, barrel swaps, etc.  Only available in black hard coat or bare...
$40.00 – $55.00 Select options This product has multiple variants. The options may be chosen on the product page
MPX Type Firing Pin And Spring
MPX-Type Firing Pin and Spring
Use the drop down to choose Gen I, II/III or other available configurations including braided fp spring Our Gen II/III firing pins will NOT work in...
$8.00 – $50.00 Select options This product has multiple variants. The options may be chosen on the product page
In Lead We Trust MPX Type Gas Valve Detent
MPX-type Gas Valve Detent
Our Replacement/Spare detents that secure your gas valve when rotated into position.  Designed to replace worn or lost detents, or have as spares. – Manufactured...
$15.00 Add to cart

In Lead We Trust

We design all of our own products, and all manufacturing is proudly done in the United States.

Our company is comprised of individuals with a collective of 50+ years of experience in all facets of the firearms business:
A collective of years of inventing & prototyping product, to problem-solving & fabricating, custom work/designs, and also dealing with high-end collectibles and all forms of NFA weapon’s design/repair/builds.

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