Sage Dynamics 12.5″ L89 – 5.56mm Gray Cerakote

$2,499.00

The SOLGW x Sage Dynamics collaboration gun is built for hard use like all SOLGW firearms, with touches defined by Aaron Cowan of Sage Dynamics. New for 2026 is the 12.5″ length, featuring a 12.5” P3 Chrome Lined barrel developed for the MK1.

Sage Collaboration guns are currently on a 90-day lead time. Also check with your local dealer for availability.

Rifle Current Lead Time: 120 Days

Sage Dynamics 12.5″ L89 – 5.56mm Gray Cerakote

Name: Sage Dynamics 12.5″ L89 - 5.56mm Gray Cerakote
Brand: SOLGW
SKU: 128516
Availability: BackOrder

Designed in collaboration with Aaron Cowan of Sage Dynamics, this 12.5″ offering is ready for just about anything you want to throw at it. The Sage Dynamics Collaboration comes equipped with the 11.75” seven-sided MLOK L89 rail, offering extensive mounting options with M-LOK slots, integrated QD sockets, and minimal POI shift with alternate shooting positions or when mounting a laser. The rifle includes SOLGW’s Liberty 2 Stage (L2S) trigger for a crisp 4.5 lb break and a rapid reset. Out of the box, this is suppressor-ready with a HUX flash hider compatible with Flow 556K and 6K suppressors.

Finished in a Cerakote Gray with FDE accessories, the rifle features the Sage Dynamics logo engraved on the magazine well and on the bolt carrier group.

New for 2026 is the 12.5″ length, featuring a 12.5” P3 Chrome Lined barrel developed for the MK1. (Note, the barrel is threaded 5/8×24 for greater precision when hanging weight off the end of the barrel and then getting it hot while shooting a lot.)

Available as an SBR (NFA items), Pistol (no foregrip) or Other (brace, foregrip, >26″).

Specifications

RailScales RSBM-P Vert Grip & HTP Dragon Rail Covers in FDE
Magpul MOE Grip & CTR Stock (SBR) or SBA5 (Pistol/Other) in FDE
L2S – Liberty 2-Stage Trigger
Inermediate Length Buffer System with 9 Position tube, A5H2 buffer and stainless steel spring
SOLGW L89 11.75″ Seven-Sided MLOK rail
HUXWRX 5/8×24 Flash Hider for HUXWRX 556K or 6K suppressors
SOLGW Liberty Charging Handle (ambi) in Tan
SOLGW 50 Degree Quick Safety Selector (ambi)
Sage Dynamics logo lasered on magwell
Rifle ships with one, 30rd Gen3 PMAG (or compliant magazine for applicable locations)
Gray H227 Cerakote
P3 Chrome-Lined 4150 Barrel, 1/7 twist, 12.5″ Carbine length gas system (MK1 barrel)

UPPER RECEIVER SPECS

Machined of 7075-T6 Aluminum Forgings and Hardcoat Anodized, Type III, Class 2
M4 Feed Ramps
Liberty Charging Handle (Ambidextrous)
SOLGW Legendary Bolt Carrier Group
- Machined from Carpenter No. 158 Steel
- HPT/MPI (High Pressure Tested/Magnetic Particle Inspected)
- Shot Peened
- Tool Steel Extractor
- Chrome Lined Carrier
- Full-Auto profile
- Chrome Lined Gas Key w/ Staked Grade 8 Screws
- Individually Test-Fired on machine gun for function
Drive-Lock Handguard for superior lockup, including anti-rotation tabs and stainless steel pin connecting upper and handguard.
- Includes integral QD swivels at 10 & 2 o’clock
- 7-sided MLOK

LOWER RECEIVER SPECS

Machined of 7075-T6 Aluminum Forgings and Hardcoat Anodized, Type III, Class 2
Stripes Rollmark
Low shelf cut for all legal uses
Integral QD mount end-plate, dual staked in place
SOLGW Intermediate buffer system with A5H2 for enhanced reliability and shootabliity with suppressors
SOLGW Liberty 2-Stage trigger (4.5 lb)
SOLGW Quick Adjust 50 Degree safety selector (Ambi)

BARREL SPECS

P3 Polygonal rifling or superior precision, barrel life and ammunition forgiveness.
1:7 twist
41v50 ChromMoly
.223 Wylde Chamber, accepts .223 Rem and 5.56 NATO
Chrome-Lined chamber and bore
Phosphate coated exterior
5/8×24 thread pitch for better use with suppressors
HUX QD FH for FLOW 556K/6K suppressors
.750″ gas journal with deep dimple
12.5″ Carbine gas length
14.5″ Mid-Length gas length