Finish Your AR-15 Build — New Frontier Armory Lower Bundle
Wrap up your AR project quickly and correctly with New Frontier Armory’s Lower Build Bundle — now featuring Smith Defense components for the Lower Parts Kit and Buffer Tube Kit. We’ve combined everything you need for a dependable lower receiver: a complete parts kit, a Smith Defense buffer tube assembly, and a mil-spec adjustable stock — all packaged for a clean, stress-free build.
Every Smith Defense component in this kit is made to true mil-spec dimensions, so parts mate cleanly and function reliably. The result is crisp fitment, predictable trigger engagement, and a buttstock that locks up firmly — no sloppy tolerances or compatibility headaches.
Why this bundle works
-
All-in-one convenience — every small part for a standard lower, bundled together so you don’t have to mix brands.
-
Mil-spec assurance — Smith Defense parts built to standard AR-15 dimensions for trouble-free interchangeability.
-
Built to endure — corrosion-resistant hardware and an impact-resistant polymer stock.
-
Installer friendly — includes the pins, springs, and hardware you need for straightforward installation.
-
Rugged reliability — components rated for long-term use and range duty.
What’s included
-
Smith Defense AR-15 Lower Parts Kit — mil-spec fire control hardware with carefully finished sear surfaces, complete mil-spec pin set, A2-style pistol grip (for lower build kits), bolt catch, trigger guard, magazine catch, buffer-retainer kit, and selector components.
-
Smith Defense Buffer Tube Kit — mil-spec 7075-T6 aluminum 6-position carbine buffer tube, 3-oz buffer, steel castle nut and end plate, buffer retainer, and buffer spring.
-
Mil-Spec Adjustable Stock (New Frontier Armory) — tough polymer construction, snug fit to the tube, and multiple length-of-pull positions for a comfortable, repeatable cheek weld.
