Overall length is 31.25" and these are built with our US Made TMP polymer UMP semi auto style receivers. These have the correct length ejection port to run all the pistol calibers like the real UMP. The barrel is black nitrided finished, threaded in the standard 16mmx1LH thread pitch and is 12.5" long, comes with a thread protector. This has (1) US made UMP .45, 10 round magazine, 4-piece aluminum rail kit, hand stop with sling loops and vertical fore grip. Brace is pinned as well. GREAT for states like Connecticut and New Jersey! ***NOTE BEFORE ORDERING: PLEASE SHARE THIS LINK WITH YOUR DEALER PRIOR TO PURCHASE TO MAKE SURE THEY WILL ACCEPT THE TRANSFER***