KAK Industry AR 15 LPK Pin and Detent Kit Black AR15 KT 16 UPC 811163030564
Product Description
The KAK Industry® AR-15 LPK Pin and Detent Kit (SKU: AR15-KT-16 / UPC: 811163030564) provides a complete, factory-grade package of vital small components engineered to complete a stripped lower receiver or replenish the armorer bench. Designed and manufactured in the USA, this comprehensive kit eliminates downtime caused by lost springs, worn detents, or damaged pins, delivering the mechanical reliability required for duty rifles, custom competition builds, and defensive carbines.
Every component in this kit is manufactured to strict USGI Mil-Spec tolerances from high-tensile carbon steel. The cross pins and fire control pins undergo precision centerless grinding and heat-treatment to achieve superior shear strength under sustained live-fire cycling. Coated in a heavy-duty manganese phosphate surface treatment, these parts resist surface abrasion, harsh solvent washouts, corrosion, and continuous mechanical friction, ensuring smooth detent engagement without galling receiver channels.
Whether assembling a ground-up AR-15 build or keeping a dedicated "oops kit" in your field armorer pack, the AR15-KT-16 covers every critical interface. The kit includes the front pivot pin, rear takedown pin, two takedown/pivot detents, standard .154-inch hammer and trigger pins, bolt catch detent, bolt catch roll pin, safety selector detent, and buffer retainer pin, ensuring total component consistency across your firearm build.
*Armorer Bench Notes & Real-World Staging Guidance:*
Fitment Matrix: Fits standard Mil-Spec AR-15, M4, and M16 lower receivers. CRITICAL ARMORER NOTICE: This kit features standard .154-inch trigger and hammer pins; it will NOT fit Colt legacy commercial receivers with oversized .169-inch fire control pin holes. Additionally, the pivot and takedown pins are sized strictly for AR-15 pattern receivers and are NOT compatible with wider AR-10, DPMS-pattern, or LR-308 platforms. Always use roll pin punches with receiver ear supports to avoid snapping lower receiver bolt catch bosses.
- Ensure the host receiver is completely clear, devoid of live ammunition, and clean from foreign debris or blasting media in internal detent channels.
- Install the bolt catch plunger, spring, and catch lever into the lower receiver, utilizing a roll pin punch and receiver support block to drive the roll pin cleanly between the receiver bosses.
- Depress the front pivot detent spring and detent using a dedicated pivot pin installation tool or 1/4-inch clevis pin, sliding the KAK pivot pin into position until the detent locks into the internal channel.
- Assemble the trigger and hammer assemblies into the lower well, pressing the KAK .154-inch pins through the receiver walls while confirming proper j-spring engagement and hammer spring leg orientation.
- Install the rear takedown pin, detent, and spring prior to torquing the receiver end plate and castle nut, followed by a full manual function check of the safety selector and bolt catch hold-open.
Key Features
- Complete Pin & Detent Package: Supplies all essential pins, detents, and plungers needed to finish or service an AR-15 lower receiver.
- Precision Swiss-Turned Machining: Turned to exact USGI blueprints, providing clean chamfers and smooth outer surfaces for effortless travel.
- Heat-Treated Steel Construction: High-strength carbon steel cores deliver rigid shear resistance and long-lasting mechanical service life.
- Manganese Phosphate Coating: Mil-Spec MIL-DTL-16232 finish prevents corrosion, sheds carbon fouling, and retains lubricant.
- True .154-Inch Fire Control Pins: Drop-in fit for all standard Mil-Spec single-stage and two-stage AR-15 trigger groups.
- Essential Armorer Staging: Ideal replacement pack to keep on the workbench for instant repair of launched detents or damaged roll pins.
- 100% Made in the USA: Precision crafted in the United States under strict quality control standards.
Product Specifications
- Brand: KAK Industry®
- Model/Series: AR-15 Lower Receiver Pin and Detent Kit
- MPN / SKU: AR15-KT-16 / AR15KT16
- UPC: 811163030564
- Platform Compatibility: AR-15, M4, M16 Lower Receivers
- Pin Diameters: .154-inch (Hammer/Trigger) / .250-inch (Takedown/Pivot)
- Material: Heat-Treated Carbon Steel
- Finish: Manganese Phosphate / Black Oxide
- Kit Contents: Pivot Pin, Takedown Pin, (2) Detents, (2) FCG Pins, Bolt Catch Plunger, Bolt Catch Roll Pin, Selector Detent, Buffer Retainer
- Country of Origin: United States
