Rock Island TAC Ultra MS 10mm 4.25″ | 8+1 | 51994

The Rock Island (Armscor) TAC Ultra MS is a mid-size 1911-style semi-automatic pistol chambered in 10mm and finished in black parkerized steel. It ships with black/gray G10 grips, a full-length under-Picatinny rail, dovetail adjustable rear sight and a fiber-optic front sight. The pistol is supplied with an 8-round magazine and a skeletonized hammer and trigger with an adjustable overtravel stop. For a durable, compact red-dot option under $1,000 that pairs well with this platform consider a Holosun HS507C or an equivalent micro red dot mounted with the appropriate 1911 plate.

Product Specifications

• The manufacturer is Armscor/Rock Island Armory.
• The model is TAC Ultra MS (Tac Ultra).
• The caliber is 10mm.
• The capacity is 8 + 1.
• The frame material is steel.
• The finish is black parkerized.
• The barrel length is listed inconsistently in source data (4.2 in and 4.25 in).
• The barrel type is button rifled.
• The overall length is 8 inches.
• The listed unloaded weight is 37.7 oz.
• The sights are fiber optic front and dovetail adjustable rear.
• The grips are black/gray G10.
• The action is single action.
• The pistol includes a full-length under-Picatinny rail.
• The UPC is 4806015519942.

This mid-size TAC Ultra balances 1911 ergonomics with a full-length rail and modern sighting options, making it a practical choice for shooters who want a stout 10mm 1911 with upgrade potential. The combination of steel construction, a crisp factory trigger, and G10 grips gives the pistol a solid feel out of the box and a platform that accepts optics or other rail-mounted accessories.

Owners commonly praise its crisp factory 4–6 lb trigger and the robust steel construction paired with comfortable G10 grips.