AR-15 – Mil-Spec Stock Assembly – 6-Position – Black
PLEASE DOUBLE CHECK DETAILS AND FITMENT BEFORE PURCHASE.
The UTG PRO Model 4 6-Position Mil-Spec Stock Assembly is a complete rear-end setup for AR-15 builds using a mil-spec carbine receiver extension pattern. UTG PRO makes this assembly in the USA and includes the stock, buffer tube, carbine buffer, spring, end plate, and castle nut, giving the buyer a full stock assembly instead of a half-finished parts scavenger hunt.
Fitment
Fits AR-15 / M16 pattern rifles that use a mil-spec carbine receiver extension setup.
Does NOT fit
Does not fit commercial-spec carbine receiver extensions, pistol tubes, or fixed-stock receiver extension setups.
What it does
This assembly gives the rifle a 6-position collapsible stock setup with the supporting rear-end parts needed for installation. It is built for adjustable length of pull, a solid cheek weld, and a complete mil-spec rear stock assembly for new builds, replacements, or conversions from fixed stock setups.
Why it’s worth it
This is the smarter play for customers who need the whole rear section done in one shot. Instead of piecing together random parts and hoping tolerances behave, they get a matched assembly from one maker with the stock and hardware already packaged together.
Specs
- Complete 6-position mil-spec stock assembly
- Black finish
- Made in USA
- Fits AR-15 / M16 platforms
- Collapsible stock design
- Includes mil-spec receiver extension / buffer tube
- Includes carbine buffer
- Includes action spring / buffer spring
- Includes end plate / locking plate
- Includes castle nut
- Stock body is polymer
- Receiver extension is aluminum
- Sling loop provision
- Approx. weight: 16.9 oz
What’s included
Stock, mil-spec receiver extension / buffer tube, carbine buffer, buffer spring, end plate, and castle nut.
Tools needed
Armorer’s wrench, basic lower-receiver assembly tools, and stable bench support for proper installation.
Install notes
Install on a compatible lower receiver using proper castle nut torque and staking if desired. After installation, verify position lockup, buffer retention, rear-end assembly alignment, and safe function before use.
Verify before you buy
Verify compatibility before you purchase: AR-15 / M16 platform, mil-spec carbine receiver extension fitment, and that you want the complete stock assembly rather than a stock-only option.
⚠ Trademark & Compatibility Disclaimer
IronKells Armory LLC is not affiliated with, endorsed by, or sponsored by any manufacturer mentioned. All trademarks are the property of their respective owners and are used only to identify compatibility or fitment.
⚠ Install & Compatibility Disclaimer
Installation should be performed by a qualified armorer or gunsmith. Improper installation, modification, or use may affect firearm safety and reliability. Buyer is responsible for verifying compatibility, performing proper function testing, and ensuring safe operation.
