SOTM4MOD1 A5 Forged Complete Lower Receiver Black · right and left side · drag to pan, scroll to zoom

CONFIGURATION SHOWN: SOTM4MOD1 A5 forged lower receiver, black anodized, with the Schmid Inside Elite two-stage DLC trigger, Geissele Ambi Posi-Snap selector, Geissele Maritime bolt catch, button magazine release, nitride takedown and pivot pins, B5 Systems aluminum trigger guard, SOT A5 nine-position buffer tube with laser-engraved index marks, Forward Controls Design CN5F extended castle nut, B5 Systems QD end plate, A5H2 buffer, and a B5 Systems Bravo stock and Type 23 grip in black.

CONFIGURATION SHOWN: SOTM4MOD1 A5 forged lower receiver, black anodized, with the Schmid Inside Elite two-stage DLC trigger, Geissele Ambi Posi-Snap selector, Geissele Maritime bolt catch, button magazine release, nitride takedown and pivot pins, B5 Systems aluminum trigger guard, SOT A5 nine-position buffer tube with laser-engraved index marks, Forward Controls Design CN5F extended castle nut, B5 Systems QD end plate, A5H2 buffer, and a B5 Systems Bravo stock and Type 23 grip in black.

Ordering. Price to be confirmed · SKU LWR-SOTM4MOD1A5-F-BLK. Trigger: Schmid Inside Elite 2-Stage, DLC, curved bow (standard) · Geissele Automatics G2S® two-stage, installed +$100 · LaRue Tactical MBT-2S two-stage, curved or straight bow, installed +$100. Other finish: FDE. Serialized firearm; ships to your FFL dealer only. Upper, bolt carrier group, charging handle and magazine not included.

The lower the forged rifles are built on. This is the SOTM4MOD1 A5 forged lower from the SOTM4A5 Forged Series rifles, sold complete: the same trigger, controls and A5 recoil system, ready for any Mil-Spec AR-15 upper.

What forged buys: strength and universal fit. Forging presses the 7075 aluminum into shape instead of cutting it from a solid block, so the grain of the metal follows the shape of the receiver. That makes a forged lower stronger than a billet one, and tougher against impact and hard use. It is held to Mil-Spec dimensions, so it pairs with any Mil-Spec AR-15 upper.

A two-stage trigger as standard. The Schmid Inside Elite two-stage in DLC: 3.5 lb total, 2.0 lb to the wall and 1.5 lb to break. The Geissele G2S® or the LaRue Tactical MBT-2S can be installed instead, for $100.00 more. Second of Ten does not stone, polish or modify sear engagement surfaces.

Numbered stock positions. The SOT A5 buffer tube has nine positions, with numeric index marks 1 through 8 laser engraved on it. The B5 Systems Bravo stock has a window over the tube, so you can read the setting at a glance and return to it.

A5 recoil system, staked and locked. A5H2 buffer and rifle-length spring in the A5 tube, a Forward Controls Design CN5F extended castle nut staked into the B5 Systems QD end plate, and Vibra-TITE VC-3 on the threads.

Controls. Geissele Ambi Posi-Snap selector, Geissele Maritime bolt catch (left side; this version has no ambidextrous bolt release), button magazine release, nitride takedown and pivot pins.

Where this lower can ship. Not available in California, Connecticut, Delaware, Illinois, Maryland, Massachusetts, New Jersey, New York, Rhode Island, Washington or Washington, D.C. A lower receiver is a serialized firearm and ships to your FFL dealer only. Laws change: please confirm with your local FFL before ordering.

Photographed as built. These are photographs of the lower, not renderings, taken on both sides. The serial number is masked; the address rollmark is not. The selector markings include AUTO for appearance only: every Second of Ten firearm is semi-automatic, with a semi-automatic trigger.

Photography © Second of Ten LLC. MONOBLOC® and HMB™ are marks of HM Defense, LLC, used under license. Bombproof by Design™ is a mark of Second of Ten LLC. Cerakote® is a mark of NIC Industries; G2S®, Posi-Snap and Maritime of Geissele Automatics; MBT-2S of LaRue Tactical; Inside Elite of Schmid Inside; WARHAMMER of Breek Arms; CN5F of Forward Controls Design; Bravo and Type 23 of B5 Systems; L5AWM® of Lancer Systems; PMAG®, GEN M3™ and MBUS® of Magpul Industries; MuzzLok® of Faxon Firearms; Vibra-TITE of ND Industries; M-LOK® of Magpul Industries. Marks are the property of their owners; their appearance indicates that Second of Ten incorporates the component, not sponsorship, affiliation or endorsement.