Seekins Precision IRMT3 Billet Upper black 223

Name: Seekins Precision IRMT3 Billet Upper black 223
Brand: Seekins Precision

Seekins Precision · Upper Receiver

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Seekins Precision IRMT3 Billet Upper black 223

Best price

$263.99at GrabAGun

Sale checked Nov 13, 2026

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Fits and works with

Caliber: 5.56 / .223 · Shop matching ammo
Bolt: Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups

Specifications

Manufacturer: Seekins Precision
Color: Black
Platform: AR-15

Where to buy

Store	Price	Availability	Buy	Add to build
GrabAGun Best price	$263.99Salechecked Nov 13, 2026	Check store	Buy at GrabAGun
Rainier Arms	Check priceprice on the store's site	Check store	Buy at Rainier Arms

Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.

Price history

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Dashed line = out of stock. Tracking since Nov 12, 2026.

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Store	Latest	Lowest	Highest
GrabAGun	$263.99	$263.99	$263.99

Since Nov 12, 2026.

About this part

The Seekins Precision IRMT3 Billet Upper black 223 is a 5.56 / .223 upper receiver from Seekins Precision. One store lists it, GrabAGun at $263.99.

From the manufacturer

Seekins Precision’s Integrated Rail Mounting technology (IRMT) uppers integrate the rail mounting points into the upper retaining the stiffness of a true monolithic upper while allowing the rails to be completely modular. This new upper design is considerably thicker in the most critical area and will aid in squeezing all of the potential accuracy out of your AR15 rifle. Instead of a standard barrel nut our IRMT system uses an externally threaded, Steel barrel nut with 1-1/8” wrench flats on it for simple installation. No special proprietary wrenches needed.
The IRMT-3 V3 Upper is only compatible with the Seekins Precision SP3R V3 rail system.

Ships with a forward assist & dust door already installed.
weight: 13.20oz