Description
The TacFire MAR156RSK Ranger Complete Stock Kit takes the guesswork out of finishing your AR-15 lower. Instead of piecing together a buffer tube here and a stock there, you get the whole receiver extension setup in one box. It bolts onto any mil-spec AR-15 lower and gives you a solid, adjustable platform without breaking the bank on a budget build or refresh.
The heart of the kit is the Ranger 6-position stock, which lets you slide the length of pull to fit your body, your gear, and the way you shoulder the rifle. That adjustability matters whether you're running a plate carrier, shooting off a bench, or just handing the rifle between family members with different arm lengths. The stock also carries a QD sling socket, so you can clip in a single-point or two-point sling and get moving.
What Comes in the MAR156RSK Ranger Kit
TacFire builds these kits to be complete, so you're not making a second parts order to finish the job. You get the Ranger stock, a mil-spec 6-position buffer tube, a carbine-length buffer spring, a buffer, an end plate, and a castle nut. That's the full stack of components needed to mount a stock to a standard lower receiver.
Getting the Ranger Stock Kit on Your Rifle
Installation is straightforward for anyone who has spun a castle nut before. Thread the buffer tube into the receiver extension threads, seat the end plate, run the castle nut down, and slide the stock on. Drop the spring and buffer in, and you're squared away. If you're new to it, a simple armorer's wrench makes the job clean, and staking the castle nut is always smart for a rifle that sees real use.
For the price of admission, this kit is a dependable way to get a functional, adjustable stock on a fresh build or to swap out a tired factory setup. It hits the mark for range guns, truck guns, and first-time builds where you want everything working together without overthinking it.
Key Specifications
- Manufacturer: TacFire
- Manufacturer Part Number: MAR156RSK
- UPC: 729205679650
- Platform: AR-15
- Stock Type: Ranger 6-Position Adjustable
- Buffer Tube: Mil-Spec 6-Position
- Buffer Spring: Carbine Length
- Sling Attachment: QD Sling Socket
- Kit Type: Complete Stock Kit
- Color: Black
What’s Included
- Ranger 6-position adjustable stock with QD sling point
- Mil-spec 6-position buffer tube
- Carbine-length buffer spring
- Buffer
- End plate
- Castle nut
Frequently Asked Questions
Does the MAR156RSK Ranger kit include everything to complete my stock?
Yes, this is a complete kit built to finish the receiver extension on a mil-spec AR-15 lower. It ships with the Ranger stock, buffer tube, buffer spring, buffer, end plate, and castle nut. You will not need to order separate buffer tube components to get it installed.
Will the Ranger stock kit fit any AR-15 lower?
It is designed for standard mil-spec AR-15 lower receivers, which covers the vast majority of rifles on the market. As long as your lower uses mil-spec receiver extension threads, this kit threads right on. It is worth confirming your lower is mil-spec rather than commercial spec before ordering.
Does the TacFire Ranger stock have a sling attachment point?
It does. The Ranger stock includes a QD sling socket that accepts a quick-detach push-button swivel. That lets you run a single-point or two-point QD sling and swap it out fast when you need to.
Do I need special tools to install the MAR156RSK kit?
An armorer's wrench makes the install clean and helps you properly tighten the castle nut. You can get by with basic tools in a pinch, but the wrench is the right call. For a rifle that sees regular use, staking the castle nut is a good idea to keep it from backing off.




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