NEW HBI UPGRADES FOR THE SPRINGFIELD KUNA
Precision parts engineered for performance and durability — now available.
Short Stroke Buffer Kit — Faster Bolt Response.
Engineered drop-in set to shorten bolt throw and sharpen cadence.
Our high-performance polyurethane buffer and +20% spring work together to trim rearward travel, keep the bolt on task, and improve shot-to-shot cadence. Simple drop-in replacement for the factory pad and spring.
Rear Interface Upgrades for the Kuna
Build your rear interface the right way—1913 rear-rail with QD, SBT direct-fit, and Magpul Zhukov-S/UCS adapters for compact, foldable configurations.
Our Stocks & Braces lineup lets you set the rear of your Kuna exactly how you like it—all machined from 6061-T6 aluminum and hard-coat anodized for strength and durability. The 1913/Picatinny rear-rail adapter adds a rugged interface with an integrated QD for MCX/MPX-compatible stocks and braces; the SBT direct-fit mount ties straight into the receiver to preserve a tight, side-folding profile; and the Magpul adapters—Zhukov-S for the slimmest profile and UCS for reversible left/right folding.
Safety Selectors
Dial in fire-control ergonomics with larger, contoured selectors, AK-style leverage, or a minimalist delete—then fine-tune feel with our 15% reduced weight selector spring.
Drop-in Safety Selectors (L/R)
Increased surface area and contouring for positive, confident control without trigger-finger interference.
AK-Style Finger Selector (L/R)
Quick, intuitive flicks between safe and fire while keeping clear of the trigger finger; or pair it with other HBI selectors
Selector Delete (L/R)
Minimalist delete with a machined indicator line—replace an intrusive lever or pair with other Kuna safety selectors.
HB Industries
6448 S Ash Ave, 85283, Tempe
FOG HORN 