Springfield Armory SAINT 5.56 M-Lok B5 – 16" Barrel, Black (ST916556B-B5)

The SAINT 5.56 with full B5 Systems furniture — Bravo stock, Type 23 P-Grip, and mid-length M-Lok handguard — on a 16" CMV Melonite barrel (1:8, 1/2x28) with mid-length direct impingement and a pinned gas block. Ships with a Magpul PMAG and padded case. Springfield part number ST916556B-B5, UPC 706397935504.

This listing is for the SAINT 5.56 M-Lok B5 configuration (ST916556B-B5) only.

B5 Furniture, Classic Sight Setup

• B5 Systems Bravo stock with integrated QD sling mounts and cushioned buttpad.
• B5 Systems mid-length M-Lok handguard with stamped metal heat shields.
• B5 Systems Type 23 P-Grip — steep angle, extended tang, palm-filling shape.
• A2 front sight base with low-profile adjustable flip-up rear.

Receivers and BCG

Forged 7075-T6 upper and lower with Type III hardcoat anodizing. Lower includes the Accu-Tite tension system. M16 BCG with Carpenter 158 bolt, HPT/MPI, Melonite finish. Nickel boron coated GI trigger and carbine H heavy tungsten buffer.

What’s Included

• SAINT 5.56 M-Lok B5 rifle
• (1) 30-round Magpul PMAG Gen M3
• Padded rifle case

Springfield Armory SAINT Specifications

Frequently Asked Questions

What barrel length and twist?
Springfield lists a 16" CMV Melonite barrel with 1:8 twist and 1/2x28 muzzle threads.

What furniture is on this SKU?
Full B5 Systems package: Bravo stock, Type 23 P-Grip, and mid-length M-Lok handguard. This listing is for that B5 configuration only (part ST916556B-B5).

Does it include a case and magazine?
Yes. Springfield includes a padded rifle case and one 30-round Magpul PMAG Gen M3.

What is the published weight?
Approximately 6 pounds 4 ounces; overall length 33" to 36.25".