SOTM4MB-LW Monobloc® Light Weight Rifle Black anodized · Black MultiCam furniture · right and left side · drag to pan, scroll to zoom

CONFIGURATION SHOWN: SOTM4MB-LW — 16″ Monobloc® barrel finished in black Cerakote® with a Wilson Combat Q-Comp hybrid muzzle brake and 15″ SOT Light Weight M-LOK Premium Line handguard, paired with a SOTM4MOD2A5 lower receiver — extended paddle magazine release, ambidextrous selector switch, ambidextrous bolt release (SOT proprietary billet serrated release button shown), VLTOR A5 receiver extension with a Primary Weapons Systems ratchet-lock castle nut and end plate, B5 Systems Bravo stock and Type 23 P-Grip in Black MultiCam.

CONFIGURATION SHOWN: SOTM4MB-LW — 16″ Monobloc® barrel finished in black Cerakote® with a Wilson Combat Q-Comp hybrid muzzle brake and 15″ SOT Light Weight M-LOK Premium Line handguard, paired with a SOTM4MOD2A5 lower receiver — extended paddle magazine release, ambidextrous selector switch, ambidextrous bolt release (Geissele Maritime Bolt Catch shown), VLTOR A5 receiver extension with a Primary Weapons Systems ratchet-lock castle nut and end plate, B5 Systems Bravo stock and Type 23 P-Grip in Black MultiCam.

* SOTM4MB-LW names the rifle; the serialised part is the lower. The lower receiver is rollmarked MOD: SOT M4, which is the model designation of record on the manufacturer's books and on the transfer paperwork. MB names the Monobloc® barrel it is built around and LW the light weight configuration; the lower beneath it is a billet SOTM4MOD2A5, where MOD2 identifies the controls package and A5 the VLTOR A5 recoil system. This page shows the billet lower.

The bolt release is one ambidextrous system in two parts. The Geissele Automatics Maritime bolt catch carries the left side; the right side is a serrated billet release button of Second of Ten's own design, proprietary to this receiver. Each side of this page shows the half facing the camera — the rifle has both.

The trigger is not an option on this configuration. The SOTM4MB-LW is built with the Geissele Automatics G2S^® two-stage only. It is a two-stage, and Second of Ten does not stone, polish or modify the sear engagement surfaces.

The tension screw is machined into the billet receiver. A nylon-tipped screw bears against the upper receiver to take up the play in the upper-to-lower fit, giving a consistent, solid feel without an aftermarket wedge or accessory. It is a fit and feel feature — it is not an accuracy feature, since the barrel and the optic both sit on the upper.

Photography © Second of Ten LLC. B5 Systems, Cerakote, Geissele Automatics, HM Defense, MultiCam, Primary Weapons Systems, VLTOR Weapon Systems and Wilson Combat marks are the property of their owners; their appearance indicates that Second of Ten incorporates the component, not sponsorship, affiliation or endorsement. Photography shows the item as built; shipped configuration may differ.