Gear Guy / Builds / Combat DMR

Build file · AR-15 platform

Combat
DMR

An 18″ Mk12-profile barrel on rifle-length gas under a 15″ Geissele rail, a fixed A2-pattern stock, a Nightforce ATACR 7-35×56 in a one-piece 34 mm mount with a Vortex Impact 4000 rangefinder riding above it, a HUXWRX flow-through can, a bipod, and an Insight light and EOTech laser on one pad. Configured entirely in Gear Guy — this page is the build’s actual parts file.

18″Barrel · rifle gas
22 partsfitted on the bench
$11,404Parts listed below
~550 mEngagement class, see below
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The Combat DMR rendered on Gear Guy's bench

Captured from the app · this exact configuration

Parts file

What’s on this rifle.

Straight from the app’s shared build page — including which parts ship to your door, which need a licensed dealer, and which live under the NFA.

BUILD FILE · COMBAT DMRAR-15 · 18″ · 5.56
PartFulfillmentPrice
Mil-Spec A4 Upper ReceiverVarious · upper_receiver FFL transfer required $80
Mil-Spec Stripped Lower ReceiverVarious · lower_receiver FFL transfer required $90
18in Mk12 SPR Profile Barrel with Low-Profile Gas Block (Rifle Gas)Various · barrel Ships to your door Price TBD
Geissele SMR Mk4 15" M-LOK RailGeissele · handguard Ships to your door $320
Fixed Rifle Stock (A1/A2 Pattern)Various · stock Ships to your door Price TBD
Magpul MIAD Gen 1.1 GripMagpul · grip Ships to your door $40
HUXWRX QD Flash Hider 556 (1/2x28)HUXWRX · muzzle Ships to your door Price TBD
OSS/HUXWRX HX-QD 556 TiHUXWRX · suppressor NFA item · ATF registration $1,199
Nightforce One-Piece 34mm Scope MountNightforce · optic Ships to your door Price TBD
Magpul MBUS Sight - FrontMagpul · sights Ships to your door $40
Vortex Impact 4000 Ballistic RangefinderVortex Optics · rangefinder Ships to your door $2,200
Nightforce ATACR 7-35x56 F1Nightforce · scope_in_rings Ships to your door $3,600
Magpul PMAG 10 Gen M3 (5.56)Magpul · magazine Ships to your door $14
Insight WMX200 Weapon LightL-3 Warrior Systems · light Ships to your door $429
EOTech OGL-C LaserEOTech · laser Verify export & local law $2,999
SureFire SR-D-IT Dual Pressure Pad (Light + ATPIAL Laser)SureFire · switch Verify export & local law $139
TangoDown Vertical Fore Grip Stubby (BGV-MK46K)TangoDown · foregrip Ships to your door $75
UTG Tactical BipodUTG · bipod Ships to your door $60
Mil-Spec Single-Stage TriggerVarious · trigger Ships to your door Price TBD
Mil-Spec Charging HandleVarious · charging_handle Ships to your door $15
Mil-Spec BCG (MPI/HPT)Various · bcg Ships to your door $90
Carbine Buffer & Spring KitVarious · buffer Ships to your door $15
22 parts · 5 unpriced · captured September 2026 PARTS LISTED $11,404

The ~550 m class, and what it is not

Gear Guy files this rifle in a ~550 m engagement class. That is a coarse class taken from a published Army doctrine figure for a 20-inch 5.56 rifle with iron sights (point target 550 m), applied as a cartridge-class figure to any 5.56 rifle in that barrel window; the magnified scope sets no limit below it. It is an estimate from public data, not a measurement of this rifle, not a zero, and not a guarantee of hits at any distance. The suppressor is an NFA item: as of January 1, 2026 the federal tax is $0, but registration is still required.

This is general information, not legal advice. Federal rules only — your state may differ. Rules change; verify current ATF guidance before configuring a real firearm. Learn more at atf.gov.

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