SRU STTI PDW Carbine Kit for M9 Series Gas Blowback Airsoft Pistols (Color: Black / Complete Gun)

"Great CQB type platform to build on.
2 different adapters included.
Run a GBB with this, recommend a drum mag to really get to work.
Consider getting a mid sized silencer and a longer barrel to fit and watch the fun begin.

"I bought just the kit. The kit includes the frame and two styles of attachments. One fits the M9 without a rail and one fits M9s with a rail. It also comes with set screws, fasteners, and metric allens.
It was perfect for my Umarex EF M9A3. It was a snug fit with no wiggle room so I didn't even use the set screws. Installation was quick and painless. Three screws used for the attachment. Slide the attachment into the frame and one larger one to lock it to the frame.
Very good, simple, light weight, solid construction.
I only have one complaint. The undercut for the middle finger of the trigger hand is not big enough. This might fit a child's hand or those with slim fingers, but not an average American adult. I will have to grind it down with a dremel so my finger can fit. But for the price, I can overlook it.
For those that want to add a silencer/barrel extension (like me), you will need it to have an OD smaller than 30mm. The front opening is about 29.5mm. If you want to open up that front hole instead, I doubt you could get bigger than 32mm. The front of my threaded barrel is recessed about 3 inches, I wouldn't go shorter than a 100mm length.

"Fits perfectly with any standard frame M9 and though its light weight it feels sturdy and well made. the m9 also has no wobble inside when properly installed.