Rifle Combat Magwell for Sig Sauer M400 / M400 SDI The Sig Sauer M400 RCM (Rifle Combat Magwell) features a 250% larger flared funnel surface allowing for consistent and fast reloads under any condition and is intended to fit the SIG M400, M400 PRO, M400-TREAD and SIG 516 lowers. The SDI model will fit on SIG M400 SDI, SDI X or DH3 models. The 516 G3 model will fit on the newer SIG 516 G3 lowers. THERE ARE MULTIPLE VARIATIONS OF LOWER RECEIVER UNDER THE "M400" NAME PLEASE USE THIS CHART TO DETERMINE WHICH RCM TO PURCHASE. Compatible with all major magazines (including M3 PMAGs) on the market as well as higher capacity options like the Magpul D60 or Surefire MAG5-60. The M400 RCM works great for unconventional shooting positions, working under night vision or reloading on the go. With the M400 RCM you focus less on getting rounds in the gun and more on getting them down range. Details: Material: Nylon Polymer Weight: 0.6oz (17g) Included Hardware: RCM 4-40 Bolt (2) Includes 3/32" Hex L-Key for Install Instructions: Available Here Color: Black Made in the USA *The RCM fits SIG M400, M400 PRO, M400-TREAD and SIG 516 lowers. This model will not work on the SIG M400 SDI, SDI X or DH3 models. If you are experiencing difficulty during installation contact support via email or Instagram direct message for fastest response.
