New Uppers Are Here
New rifle uppers were recently added to the SIG Webstore. Transform your AR/M4 lower into a SPEAR-LT. Or choose the M400 upper which includes a two-stage trigger and our popular TANGO-MSR LPVO riflescope.
MCX-SPEAR LT 9″ 300BLK
$1,699.99
The MCX-SPEAR LT, developed for Special Forces, is the most advanced platform of its kind. Convert any M4/AR15 into a modern folding firearm with superior reliability, durability, and accuracy.
SIG AR UPGRADE KIT
$1,199.99
Take your rifle to the next level! This M400 kit includes all the necessary components for a complete swap, including a two-stage match trigger as well as the popular TANGO-MSR LPVO 1-6X24 (SFP) riflescope.
Looking to build the perfect rifle setup? Check out our new Deck Out Your MCX website feature. Learn how to customize your MCX with the ideal accessories, from optics and suppressors to folding stocks and grips.
Conversion Kits
MCX Rattler 5.5″ CAL-X Kit – 5.56NATO
$499.99$699.99
MCX-SPEAR LT 7.62X39 16IN CAL-X Kit With (1) 28rd Mag
$899.99$1,099.99
MCX-SPEAR LT 11.5″ Upper AR Conversion Kit 7.62X39-Black
$1,699.99
MCX-SPEAR LT AR Conversion Kit – 16″ 5.56 NATO
$2,199.99
Outfit Your MCX
ROMEO8T-AMR™ Red Dot Sight
$699.99
Collapsing/ Telescoping Stock
$299.99
Pistol Brace, Folding, Locking
$249.99
SHOP ALL PISTOL BRACES AND STOCKS
300BLK Magazines
MCX/M400 .300 BLK 30rd Aluminum Magazine
$17.99
MCX/M400 .300 BLK 30rd Magazine – GEN M3 PMAG
$29.99
300BLK Ammunition
300BLK, 125gr, Elite Match Grade, OTM, Staked, Sealed
$39.99
300BLK Subsonic, 220gr, Tactical Rifle, OTM, Staked, Sealed
$44.99
SIG SAUER 72 PEASE BLVD NEWINGTON, New Hampshire 03801
FOG HORN 