Interested in what’s HOT at SHOT Show 2026? Click here to browse our show articles.
M400 SDI PISTON for Sale
Browse M400 SDI Piston listings from verified sellers across the U.S. on GunsAmerica.
Prefer nearby results? Toggle to search local listings.
Instant Checkout
Sig Sauer M400 SDI XSeries RM400-SDI-16B
American Tactical Gun and Knifeworks (19 Sales Completed)
$1,534.99
Instant Checkout
Sig Sauer M400 SDI XSeries RM400-SDI-16B
Whispering Pines Tactical & Gunsmithing (15 Sales Completed)
$1,671.99
Instant Checkout
Sig Sauer M400 SDI XSeries RM400-SDI-16B
Adaptive Firing Solutions (18 Sales Completed)
$1,599.99