SIG SAUER 1511134-R Spacer, M400

Extractor, 516, M400

HANDGUARD, M400, POLYMER, M4, HEAT SHIELD, BLK

The SIGM400 PRO, SIG SAUER’s take on what an AR-15 should be. This carbine comes with the good stuff - all of it - pre-installed. Like a free-floating M-LOK handguard, which promotes accuracy and...

Mag Catch Assy Kit, Ambi, M400

This Two Stage Match Flat Blade Trigger reduces the weight of the pull to break crisp and clean at approximately 5lbs. This Premium trigger is optimized to enhance any M4 / AR-15, M400, MCX, 516