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Description
The XM177E1 , specifically the later model with a full fence lower, appears under the name "XM4". It is depicted with a flat top, seeming to be the result of a chopped off carry handle with a bolted rail (which was done in the 1980s by Olympic Arms and some other manufacturers). It has an anachronistic rear sight which is a hybrid between the Troy Battle Sight and Midway Industries Flip Up Sight, and the flash hider has been altered to resemble an A1. It also appears to have been based on a civilian model, as it has semi-auto only selector markings (Fire/Safe).

The weapon is wrapped in slings with a portion tucked behind the bolt catch like the "Commando" from the first Black Ops (although the default empty reload animation in this case correctly uses the charging handle instead of trying to hit the bolt release, which couldn't possibly work with a cloth strap tucked behind it). Equipping any stock customization removes the sling wrap. Mounting optics removes the front sight but keeps the gas block. The XM4 designation is anachronistic for the time period of 1981, as the XM177 wouldn't be designated as "XM4" until 1984, and even then would be attached to an improved model of the XM177E2. The A1 pistol grip is inaccurately depicted as being solid instead of hollow.

The "Black Tide" blueprint replaces the regular handguard with a carbine length M203 grenade launcher heat shield. It also appears to have PT boat style camouflage. The "Inconspicuous" variant uses the M16A2's upper receiver (while retaining the XM177E1's earlier teardrop forward assist, however), and the "Giantsbane" variant uses an anachronistic Z-M LR 300 handguard.

Description
The XM177E1 , specifically the later model with a full fence lower, appears under the name "XM4". It is depicted with a flat top, seeming to be the result of a chopped off carry handle with a bolted rail (which was done in the 1980s by Olympic Arms and some other manufacturers). It has an anachronistic rear sight which is a hybrid between the Troy Battle Sight and Midway Industries Flip Up Sight, and the flash hider has been altered to resemble an A1. It also appears to have been based on a civilian model, as it has semi-auto only selector markings (Fire/Safe).

The weapon is wrapped in slings with a portion tucked behind the bolt catch like the "Commando" from the first Black Ops (although the default empty reload animation in this case correctly uses the charging handle instead of trying to hit the bolt release, which couldn't possibly work with a cloth strap tucked behind it). Equipping any stock customization removes the sling wrap. Mounting optics removes the front sight but keeps the gas block. The XM4 designation is anachronistic for the time period of 1981, as the XM177 wouldn't be designated as "XM4" until 1984, and even then would be attached to an improved model of the XM177E2. The A1 pistol grip is inaccurately depicted as being solid instead of hollow.

The "Black Tide" blueprint replaces the regular handguard with a carbine length M203 grenade launcher heat shield. It also appears to have PT boat style camouflage. The "Inconspicuous" variant uses the M16A2's upper receiver (while retaining the XM177E1's earlier teardrop forward assist, however), and the "Giantsbane" variant uses an anachronistic Z-M LR 300 handguard.