Great stock for mcx - SIG SAUER MCX/MPX Side-Folding M4 Style Stock Black - All NFA Rules Apply STKXFOLDM4BLK

Another excellent product from Sig Sauer. I own every stock made for the MCX and this is by far my favorite. I bought this for my MCX 300 blk. Having the xtra mag allows me to have both Super Sonic and Sub Sonic Ammo at my fingertips. Very well made with perfect function for my needs. Highly recommend