Airsoft SpecOps: Revision: Build Your Own Airsoft Mk 12 Special Purpose Rifle

Older Revision of Build Your Own Airsoft Mk 12 Special Purpose Rifle

Revision: 20130830_044712 | All Revisions

Build Your Own Airsoft Mk 12 Special Purpose Rifle

The Mark 12 Special Purpose Rifle (SPR) is a designated marksman rifle (DMR) developed by the Naval Surface Warfare Center Crane Division for SOCOM units. In the past, the United States Special Operations Forces used the Mk 12 SPR in Operation Enduring Freedom and in Operation Iraqi Freedom.

However, the Mk 12 SPR does not exist as an off-the-shelf airsoft gun. In this article, we will attempt to build a replica DMR that closely resembles the actual firearm using existing off-the-shelf parts.

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Base Airsoft Gun

The base airsoft gun to use for this project, is obviously the M4 carbine, because that's what the real firearm is based on. With an airsoft M4 carbine, the biggest conversion is to change the rail system to match the Mk 12 SPR.

The best base to use for this project seems to be the Umarex Elite Force M4 CQB AEG Airsoft Rifle, Black. If you look at the photo above closely, you'd see that the Elite Force M4 CQB has handguard and rails closely resembling the Mk 12 SPR. We purposely used the tan version in the photo above, to help you clearly see the parts. Obviously, you'd want to use the black version to match the Mk 12 SPR. The rails on the sides and bottom are screwed on and should be replaceable with shorter ones to match the Mk 12 SPR. The Elite Force M4 CQB already comes with the crane shoulder stock and the M4 receiver that matches the Mk 12 SPR, so very little conversion work needs to be done in those areas.

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Short Rails

We counted the number of indents on the short Picatinny weaver rails of the Mk 12 SPR. There are seven indents. We could not find the exact short rail, but here are some options:

The Magpul L2 MOE Rail Section, Black closely resembles the rail seen on the Mk 12 SPR. It only has five indents, but is more than enough to mount your accessories. Three of these would make your replica look like the real thing.

Not exact replicas, the M4 M16 AR15 Handguard Weaver Rail Set provides close proximity to the real thing in function. It has seven indents, just like the rails on the Mk 12 SPR, so it will function the same. Only the mount location causes these rails to be slightly longer. But still excellent option for this build.

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Magazine

The sniper rifles and DMR's, based on the M16, use shorter M16 magazines used during Vietnam war. The short magazines allow the soldier to go prone with the rifle on bi-pod. The standard M4 carbine comes with longer magazines that needs to be replace for this build. The DBoys Airsoft 70rd M4 / M16-VN Metal Mid-Cap Magazine -For AGM, CA, DBoys, Echo 1, G&G, ICS, JG, KWA, and SRC M4/M16 AEGs serves this purpose well.

Older Revision of Build Your Own Airsoft Mk 12 Special Purpose Rifle

Build Your Own Airsoft Mk 12 Special Purpose Rifle

Base Airsoft Gun

Short Rails

Magazine

Scope

Bi-Pod

Front Sight

Rear Sight

Barrel Extender

Flash Suppressor

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