Historical Background

The lineage of Windham Weaponry is deeply rooted in American firearm manufacturing heritage, bringing together a veteran team of gunsmiths and craftsmen dedicated to producing duty-grade direct impingement firearms. Combining tactical versatility with patriotic artistic finish work, Windham Weaponry offers specialized custom-finished rifles that pair eye-catching aesthetics with heavy-duty operational hardware.

Within Windham Weaponry’s catalog, the American Flag Series (Model: R16M4SFSM-FLAG) was developed as a modern, high-spec carbine platform that fuses full M-LOK modularity and Magpul furniture with a custom Cerakote finish. Designed to offer a range-ready, patriotic statement piece without compromising duty-grade performance, the American Flag rifle features a battle-distressed Stars and Stripes Cerakote theme wrapped across the upper receiver, lower receiver, and extended handguard.

Technical Overview

The Windham Weaponry American Flag Rifle utilizes a carbine-length direct gas impingement operating system chambered in .223 Remington / 5.56mm NATO. Built around a 16-inch M4 profile barrel housed inside an extended 15-inch free-float handguard, the platform optimizes handling, accessory attachment, and barrel harmonics for precise tactical and recreational shooting.

Construction & Receivers

• Upper & Lower Receivers: Constructed from high-grade forged 7075 T6 aircraft aluminum with an integrated aluminum trigger guard. Both upper and lower receivers are finished in a custom-designed, hand-detailed Battle Distressed American Flag Cerakote for extreme abrasion and environmental protection. The upper features an M4A4 flat-top configuration with continuous top Picatinny rail alignment.

• Barrels & Metallurgy: The 16-inch M4 profile barrel is machined from 4150 Chrome Moly Vanadium (11595E) steel with M4 feed ramps. Bores and chambers are fully chrome-lined for maximum durability, heat resistance, and ease of cleaning under sustained rapid fire. Cut with a 1:9 (RH) twist rate, the barrel stabilizes standard commercial and military 55-grain to 62-grain 5.56mm ammunition with high consistency.

• Bolt Assembly: The bolt is precision-machined from Carpenter 158 alloy steel, shot-peened, and rigorously inspected to ensure long-term mechanical reliability under high firing counts.

Furniture & Ergonomics

• Handguard: Equipped with an extended 15-inch Windham Weaponry free-floating aluminum handguard, matching the battle-distressed American Flag Cerakote finish. The handguard features M-LOK attachment slots at key positions and a full-length top Picatinny rail.

• Controls & Upgraded Furniture: Standard equipment includes upgraded Magpul MOE ergonomic pistol grip and a Magpul CTR collapsible stock with a friction-lock mechanism to eliminate play.

• Muzzle Device & Sights: Fitted with a classic A2-style flash suppressor threaded at 1/2×28 TPI. Comes out-of-the-box range-ready with polymer Magpul MBUS flip-up front and rear iron sights mounted on the top rail.