By using this site, you agree to the Privacy Policy and Terms of Use.
Accept
Pew PatriotsPew PatriotsPew Patriots
Notification Show More
Font ResizerAa
  • Home
  • News
  • Tactical
  • Guns and Gear
  • Prepping & Survival
  • Videos
Reading: First Look: New AR-15 Uppers From SIG Sauer
Share
Font ResizerAa
Pew PatriotsPew Patriots
  • News
  • Tactical
  • Guns and Gear
  • Prepping & Survival
  • Videos
Search
  • Home
  • News
  • Tactical
  • Guns and Gear
  • Prepping & Survival
  • Videos
Have an existing account? Sign In
Follow US
First Look: New AR-15 Uppers From SIG Sauer
Tactical

First Look: New AR-15 Uppers From SIG Sauer

Jimmie Dempsey
Last updated: September 21, 2025 5:04 pm
Jimmie Dempsey Published September 21, 2025
Share
SHARE

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

You Might Also Like

Optimal Alignment

Don’t WATCH YouTube Until You CHANGE These Settings

7 Rounds Every American Should Stockpile Before The 2026 Ammo Crunch!

Admiral says there was no ‘kill them all’ order in boat attack

Trump deploys National Guard to Memphis in ‘replica’ of DC crackdown

Share This Article
Facebook Twitter Email Print
Leave a Comment

Leave a Reply Cancel reply

Your email address will not be published.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

We Recommend
California shootings leave 2 deputies, utility worker injured; suspect also shot: officials
News

California shootings leave 2 deputies, utility worker injured; suspect also shot: officials

Jimmie Dempsey Jimmie Dempsey March 13, 2026
Long Island teen who vanished after trip to NYC found dead in Brooklyn waters
Who is Ayman Mohamad Ghazali? Lebanese-born American accused in Jewish synagogue attack
Sen Schmitt reups push for expanding denaturalization after recent acts of violence by naturalized citizens
Ex-North Carolina star Marquise Williams is skipping Tar Heels games as Bill Belichick enters second year
NASA targets April 1 launch for first crewed moon mission since Apollo
Facing death 275 feet beneath the sea, this pioneering naval diver earned the Medal of Honor
Tactical

Facing death 275 feet beneath the sea, this pioneering naval diver earned the Medal of Honor

Jimmie Dempsey Jimmie Dempsey March 13, 2026
Illegal alien’s violent tussle with federal officer leads to multiple charges after suspected Biden-era entry
News

Illegal alien’s violent tussle with federal officer leads to multiple charges after suspected Biden-era entry

Jimmie Dempsey Jimmie Dempsey March 13, 2026
US Navy partners with Anduril to develop XL underwater vessel
Tactical

US Navy partners with Anduril to develop XL underwater vessel

Jimmie Dempsey Jimmie Dempsey March 13, 2026
Pew Patriots
  • News
  • Tactical
  • Prepping & Survival
  • Videos
  • Guns and Gear
2024 © Pew Patriots. All Rights Reserved.
Welcome Back!

Sign in to your account

Username or Email Address
Password

Lost your password?