The DPMS Kitty Kat is a well-known compact complete upper chambered in 300 AAC Blackout with a 7.5-inch, black-nitride-finished barrel from DPMS (brand part no. DP51655189388). Rifled with a 1:7 twist and topped with A1-style sights, it’s built as a ready-to-pin upper for a compact 300 Blackout build. At 7.5 inches, the barrel sits well under the 16-inch federal minimum for a rifle, so it’s meant for a pistol-configured lower or a properly registered Short-Barreled Rifle rather than a standard rifle-configured lower.

Key Specifications

• Chambered in 300 AAC Blackout.
• Barreled at 7.5 inches.
• Rifled with a 1:7 twist rate.
• Barrel finished in black nitride for wear and corrosion resistance.
• Includes A1-style sights.
• Sold as part of DPMS’s well-known Kitty Kat compact upper line.
• Sold as a complete upper, ready to pin to a compatible AR-15 lower.

Frequently Asked Questions

Is this legal to build on any AR-15 lower? With a 7.5-inch barrel, this upper is well under the 16-inch federal minimum for a rifle. It’s legal on a pistol-configured lower (no shoulder stock) with no minimum length restriction, but mounting it on a standard rifle-configured lower without registering the firearm as a Short-Barreled Rifle would create an unregistered NFA firearm.

What sights come with this upper? A1-style sights.

What twist rate does the barrel use? 1:7, suited to a range of 300 Blackout bullet weights.

Buy the DPMS Kitty Kat Complete Upper

Build a compact 300 Blackout pistol around this DPMS Kitty Kat complete upper. Order it from our Lubbock, Texas gun shop, and browse our AR15 uppers selection for more AR15 uppers.