Your #1 source for blades and firearms news and updates…

  • Home
  • Knives
  • News
  • Hunting
  • Tactical
  • Prepping & Survival
  • Videos
Subscribe
Font ResizerAa
Blade ShopperBlade Shopper
  • News
  • Knives
  • Prepping & Survival
  • Tactical
  • Hunting
  • Videos
Search
  • Home
  • Knives
  • News
  • Hunting
  • Tactical
  • Prepping & Survival
  • Videos
banner
Create an Amazing Newspaper
Discover thousands of options, easy to customize layouts, one-click to import demo and much more.
Learn More

Stay Updated

Get the latest headlines, discounts for the military community, and guides to maximizing your benefits
Subscribe

Explore

  • Photo of The Day
  • Opinion
  • Today's Epaper
  • Trending News
  • Weekly Newsletter
  • Special Deals
Home » First Look: New AR-15 Uppers From SIG Sauer

First Look: New AR-15 Uppers From SIG Sauer

Adam Green By Adam Green September 21, 2025 3 Min Read
Share
First Look: New AR-15 Uppers From SIG Sauer

SIG Sauer is coming out with two new complete, drop-in AR-15 upper-receiver assemblies. These complete kits include everything you need to upgrade your AR lower.

MCX-SPEAR LT 9-inch Upper AR Conversion Kit 300BLK – FDE

The MCX-SPEAR LT developed for the Special Forces community and allows you to convert any AR15 lower into either an SBR with a stock and the appropriate paperwork or a large-format pistol with a brace.  

Features:

  • Adapts with any M4/AR15-spec lower assembly
  • Dual-rod recoil assembly eliminates buffer system
  • M4 adapter allows for picatinny rail folding stock capabilities
  • Adjustable gas system for suppressor optimization
  • Quick-change barrel design allows to easily swap calibers and barrel lengths
  • Gas-piston design reduces exposure to carbon fouling
  • Designed to go 20,000 rounds before any maintenance-part replacements
  • Ambidextrous charging handle with gas deflector
  • Replaceable parts (cam path follower, feed ramp, forward assist/deflector, charging handle locking pins) allow for longer receiver life over standard AR designs.
  • Tapered bolt design functions more reliably and lasts longer than standard square-lug M4 bolt designs.
  • Nitride coated, cold hammer forged barrel for more accuracy and barrel life

SIG AR Upgrade Kit

Upgrade your AR rifle or lower assembly with a complete, drop-in M400 upper assembly. This kit includes all the necessary components for a complete swap, including a two-stage match trigger as well as the popular Tango-MSR LPVO 1-6X24mm second focal plane (SFP) riflescope. The free-floating handguard uses a new steel lockup design that significantly reduces handguard deflection by providing maximum rigidity and allows for accessories to be attached on all four sides with no effect on accuracy. The 2-Stage Matchlite Duo trigger provides a crisp 4.5-6.5-pound pull weight with a flat blade design for a precision feel.

Included Items:

Complete 16-inch 5.56 NATO upper assembly
SIG 2-Stage Matchlite Duo trigger
Tango-MSR LPVO 1-6X24MM (SFP)

16-inch 5.56 NATO M400 Upper Assembly Features:

  • Black Anodized Finish
  • Three-prong flash-hider accepts SLH & SLX suppressor systems.
  • Dual-clamp handguard locking system for reduced deflection
  • Low-profile gas block with mid-length gas system
  • High-quality, premium barrel

Tango-MSR LVPO 1-6X24mm Features:

  • High-performance 6X optical system with low-dispersion glass
  • Integrated thread-in throw leaver for quick magnification changes
  • Illuminated MSR BDC-6 reticle with 11 brightness levels
  • Lay-flat, flip-back lens covers included
  • Dependable waterproof, shockproof, and fog-proof performance
  • Includes Alpha-MSR one-piece aluminum cantilever mount

MSRP for the MCX-SPEAR LT 9-inch Upper AR Conversion Kit is $1,699.99, and the MSRP for the SIG AR Upgrade Kit is $1,199.99. More information on these items and other products from SIG Sauer is available at sigsauer.com.

Read the full article here

Share This Article
Facebook X Copy Link Print
Previous Article BREAKING: Open Carry Ban DESTROYED as Court Rules It Unconstitutional! BREAKING: Open Carry Ban DESTROYED as Court Rules It Unconstitutional!
Next Article I Faced Down a Charging Rhino, Just Like My Great-Grandfather, Teddy Roosevelt I Faced Down a Charging Rhino, Just Like My Great-Grandfather, Teddy Roosevelt
Leave a Comment Leave a Comment

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Wake up with our popular morning roundup of the day's top blades, firearms and survavial news and updates.

RFK Jr. Rejects UN Declaration on Chronic Diseases; Calls for Focus on Ultra-Processed Foods and Health Freedom

October 1, 2025

19 Items to Scavenge from Abandoned Cars

October 1, 2025

The Association of Fish & Wildlife Agencies Honors its 2025 Annual Awards Recipients

October 1, 2025

Our Best Hound Turned Out to Be the Dog I Never Believed In

October 1, 2025

DOJ Sues LA County Sheriff Over Alleged CCW “Slow-Walk,” After 3,982 Applications Yield Just 2 Approvals

September 30, 2025

You Might Also Like

XTECH Tactical Glock Pattern Magazines [First Look]

XTECH Tactical Glock Pattern Magazines [First Look]

Tactical
Review: Cool Fire Trainer

Review: Cool Fire Trainer

Tactical
The Development of the Rifle | Lock N' Load (S1)

The Development of the Rifle | Lock N' Load (S1)

Tactical
Best CCW Fanny Packs: Off-Body Carry The Right Way

Best CCW Fanny Packs: Off-Body Carry The Right Way

Tactical

2025 © Blade Shopper. All rights reserved.

Helpful Links

  • News
  • Knives
  • Prepping & Survival
  • Tactical
  • Hunting
  • Videos

Resources

  • Privacy Policy
  • Terms of use
  • Press Release
  • Advertise
  • Contact

Popuplar

16 Types of Military Helicopters Used By The US Military
Bournemouth Air Festival: The UK’s Largest Air Festival
RFK Jr. Rejects UN Declaration on Chronic Diseases; Calls for Focus on Ultra-Processed Foods and Health Freedom
We provide daily defense news, benefits information, veteran employment resources, spouse and family resources.
Welcome Back!

Sign in to your account

Username or Email Address
Password

Lost your password?