LBE Unlimited Mil-Spec Buffer Tube Kit , Contains Buffer Tube, Castle Nut, Lock Plate, 6 Position, Fits AR-15, Black MILBUFKT

LBE Unlimited Mil-Spec Buffer Tube Kit — AR-15, 6-Position, Black Model: MILBUFKT • UPC: 765857617480 • Fits: AR-15 / M4-pattern lowers • Includes: Buffer Tube, Castle Nut, Lock Plate (End Plate) Upgrade or complete your AR-15 build with the LBE Unlimited Mil-Spec Buffer Tube Kit (MILBUFKT)—a dependable, no-nonsense receiver extension assembly that delivers correct Mil-Spec diameter, 6-position adjustability, and rock-solid retention. Whether you’re refreshing a duty carbine, piecing together a lightweight build, or standardizing parts across a fleet, this kit gives you the essentials you need for a secure, repeatable stock interface—without the guesswork. Why Choose the LBE Unlimited MILBUFKT True Mil-Spec Diameter: Built to the standard ~1.148" receiver extension size for broad compatibility with Mil-Spec adjustable stocks (not commercial-spec). 6-Position Adjustability: Fine-tune length of pull for armor, layers, or different shooters—critical for control and comfort. Complete Mounting Hardware: Comes with the castle nut and lock plate (end plate) you need for a proper installation and staking. Reliable Fit & Finish: Uniform threads and a durable black finish support smooth assembly and long service life. AR-15 Platform Ready: Sized for standard AR-15/M4 lowers and common carbine-length recoil systems. Note: This kit includes the buffer tube, castle nut, and lock plate. Buffer and recoil spring are not included unless specified by your retailer—choose your preferred weight/spring combo to match your gas system and use case. Key Features Mil-Spec Receiver Extension: Ensures compatibility with most Mil-Spec collapsible stocks from leading brands. Precision Threading: Clean, consistent threads help prevent cross-threading and ease installation. Secure Retention: The included castle nut locks the extension in place; the lock plate captures the takedown detent spring and sets you up for proper staking. Durable Black Finish: Resists wear and blends seamlessly with modern AR components. Builder-Friendly: A straightforward kit for new builds, refurbishments, or spare-parts bins. Technical Specifications Brand: LBE Unlimited Model: MILBUFKT UPC: 765857617480 Platform: AR-15 / M4 (carbine-length recoil system) Tube Diameter: Mil-Spec (~1.148") Positions: 6 Color/Finish: Black Included Parts: Buffer Tube, Castle Nut, Lock Plate (End Plate) Not Included: Buffer, recoil spring, stock, takedown detent/spring, buffer retainer/spring Compatibility & Use Cases AR-15 Carbines & Pistols (where legal): Standard carbine receiver extension footprint for adjustable stocks. Duty/Defense, Range, Competition: Set your length of pull for body armor, prone stability, or CQB maneuverability. Fleet Standardization: Keep spares on hand to simplify maintenance and armorer workflows. Installation Overview (Best Practices) Prep the Lower: Verify the firearm is unloaded. Remove the old receiver extension if present. Install Buffer Retainer & Spring: Start threading the buffer tube until it retains—but does not crush—the buffer retainer (parts not included). Capture the Takedown Spring: Slide the lock plate to capture the rear takedown detent spring; run the castle nut up to the plate. Align & Torque: Square the tube to the lower. Torque the castle nut to commonly referenced carbine spec (~38–40 ft-lbs). Stake the Castle Nut: Displace a small amount of lock-plate metal into the castle nut’s notch for duty-grade security. Function Check: Ensure the takedown pin, buffer retainer, and stock lockup operate correctly. If you’re not experienced with AR assembly, a qualified armorer can install and stake the extension quickly and safely. Tuning Tips Buffer Weight: Choose standard carbine, H, H2/H3, or a tuned buffer to match your gas length, port size, and ammo. Spring Choice: Pair with a quality carbine recoil spring for consistent lock-back and ejection. Stock Selection: Use Mil-Spec pattern stocks for the best fit—commercial-spec stocks will be loose. Care & Maintenance Periodically confirm castle nut staking and tightness after high round counts or temperature swings. Keep threads lightly lubricated during assembly; avoid over-torque. Inspect the receiver extension for dents or damage after hard use; replace if compromised. SEO-Optimized Keywords & Phrases LBE Unlimited MILBUFKT, Mil-Spec buffer tube kit, AR-15 6-position buffer tube, AR receiver extension kit, castle nut lock plate, AR-15 buffer tube black, Mil-Spec diameter 1.148, AR15 stock tube kit, carbine buffer tube assembly, 765857617480. Short Meta Description LBE Unlimited MILBUFKT Mil-Spec Buffer Tube Kit for AR-15—includes buffer tube, castle nut, and lock plate, 6-position Mil-Spec diameter for adjustable stocks. UPC: 765857617480. Buyer’s Quick Checklist ✅ AR-15 lower with carbine-length recoil system ✅ Want Mil-Spec diameter for broad stock compatibility ✅ Need 6-position adjustability ✅ Comfortable selecting your own buffer & spring (not included) Build smarter and lock down a dependable stock interface with the LBE Unlimited Mil-Spec Buffer Tube Kit (MILBUFKT)—the streamlined foundation your AR-15 deserves. "The End"