--- title: "Strike Industries Enhanced AR-15 Lower Parts Kit" description: "Enhanced AR-15 and AR-9 lower parts kit with extended pins, improved controls, springs, pins, and detents. Pistol grip and trigger components are excluded." canonical_url: "https://www.kygunco.com/product/strike-industries-enhanced-ar-15-lower-parts-kit-builders-kit" meta: author: KYGUNCO "og:description": "Enhanced AR-15 and AR-9 lower parts kit with extended pins, improved controls, springs, pins, and detents. Pistol grip and trigger components are excluded." "og:image": "https://cdn.kygunco.com/assets/products/289758/thumbnail.jpg?v=1750959415" "og:image:height": "500" "og:image:width": "500" "og:title": "Strike Industries Enhanced AR-15 Lower Parts Kit" --- > Index of every page on this site: [llms.txt](https://www.kygunco.com/llms.txt) [Home](https://www.kygunco.com/) / [Shooting](https://www.kygunco.com/category/shooting) / [Gun Parts](https://www.kygunco.com/category/shooting/gun-parts) / [Handgun & Rifle Parts](https://www.kygunco.com/category/shooting/gun-parts/handgun-and-rifle-parts) / [Rifle Parts](https://www.kygunco.com/category/shooting/gun-parts/handgun-and-rifle-parts/rifle-parts) / [Lower Parts](https://www.kygunco.com/category/shooting/gun-parts/handgun-and-rifle-parts/rifle-parts/lower-parts) / STR-SI-AR-E-LRPLT ![Main product image](https://static.kygunco.com/cdn-cgi/image/f=auto,w=600/assets/products/289758/main.jpg?v=1750959415) For illustration purposes only, this image may not be an exact representation of the product. # STRIKE INDUSTRIES Enhanced AR-15 Lower Parts Kit (Builders Kit) The Strike Industries Enhanced AR-15 Lower Parts Kit (Builder’s Kit) provides essential small parts for assembling AR-15 and AR-9 mil-spec lower receivers while allowing separate selection of a pistol grip and trigger group. It includes enhanced bolt catch, magazine catch, extended pivot and takedown pins, a 60/90-degree selector, springs, pins, and detents. Not compatible with AR-10 bolt-catch and pin components. $53.95 ** 5 interest-free payments of **$10.79** with ![Sezzle logo](https://www.kygunco.com/brands/sezzle.svg) ** Online In Store ** Flat Rate $13.94 for every 25 lbs. Shipping to HI & AK may incur additional fees. ** Ships To Your Home Fulfilled by a partner warehouse. ** Partner Fulfilled Item # 289758 Style STR-SI-AR-E-LRPLT UPC 708747544961 Condition New Manufacturer [Strike Industries](https://www.kygunco.com/brand/strike-industries) Weight 1 lb The Strike Industries Enhanced AR-15 Lower Parts Kit (Builder’s Kit) upgrades or completes AR-15/AR-9 lowers with SI’s enhanced controls and all essential small parts—while letting you choose your own pistol grip and trigger group. Cleaner ergonomics, smarter details, and a better build than a basic LPK. - Builder’s Kit: essential lower parts; excludes pistol grip and mil-spec trigger components by design - Includes SI Enhanced controls: AREBC bolt catch, ARSMC mag catch + button, AREPTP extended pivot/takedown pins, ARHS 60/90 3-in-1 selector - Trigger and hammer springs included; tuned to deliver \~4.5–5.5 lb pull when paired with SI fire-control group - Thoughtful shapes and textures for faster, more confident manipulation - Package Contents — Springs: Bolt Catch Spring; Buffer Retainer Spring; Disconnector Spring; Hammer Spring; Magazine Catch Spring; Pivot Detent Spring (x1); Selector Spring; Takedown Detent Spring (x1); Trigger Spring - Package Contents — Enhanced Parts: Enhanced Bolt Catch; Magazine Catch; Magazine Catch Button; SI Extended Pivot Pin; SI Extended Takedown Pin; HEX Selector Switch (x2); HEX Selector End Cap; 60/90-degree Selector Shaft (with screws) - Package Contents — Pins/Detents/Others: Bolt Catch Plunger; Bolt Catch Roll Pin; Hammer Pin; Pivot Detent; Selector Detent; Takedown Detent; Trigger Pin; Buffer Retainer - Product Features: Includes signature SI Enhanced parts (AREBC, ARSMC, AREPTP, ARHS 60/90 3-in-1); springs provide a consistent \~4.5–5.5 lb pull with SI FCG - Compatibility: AR-15 and AR-9 mil-spec lower receivers - Not Compatible: AR-10 for bolt catch, bolt-catch roll pin, pivot pin, and takedown pin ** WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to [www.p65warnings.ca.gov](https://www.p65warnings.ca.gov). 0.0 ** ** ** ** ** 0 reviews ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ## More from Strike Industries ```json {"@context":"https://schema.org","@graph":[{"@id":"https://www.kygunco.com/#website","@type":"WebSite","description":"Shop KYGUNCO for firearms, ammo, accessories, parts, and outdoor gear at low prices with fast, easy nationwide shipping.","name":"KYGUNCO","url":"https://www.kygunco.com/","publisher":{"@id":"https://www.kygunco.com/#/schema/organization/kygunco"}},{"@id":"https://www.kygunco.com/product/strike-industries-enhanced-ar-15-lower-parts-kit-builders-kit#webpage","@type":"WebPage","description":"Enhanced AR-15 and AR-9 lower parts kit with extended pins, improved controls, springs, pins, and detents. Pistol grip and trigger components are excluded.","name":"Strike Industries Enhanced AR-15 Lower Parts Kit","url":"https://www.kygunco.com/product/strike-industries-enhanced-ar-15-lower-parts-kit-builders-kit","about":{"@id":"https://www.kygunco.com/product/strike-industries-enhanced-ar-15-lower-parts-kit-builders-kit#/schema//kygunco"},"breadcrumb":{"@id":"https://www.kygunco.com/product/strike-industries-enhanced-ar-15-lower-parts-kit-builders-kit#breadcrumb"},"isPartOf":{"@id":"https://www.kygunco.com/#website"},"potentialAction":[{"@type":"ReadAction","target":["https://www.kygunco.com/product/strike-industries-enhanced-ar-15-lower-parts-kit-builders-kit"]}]},{"@id":"https://www.kygunco.com/#/schema/organization/kygunco","alternateName":"Kentucky Gun Company","currenciesAccepted":"USD","description":"Shop KYGUNCO for firearms, ammo, gun parts, optics, shooting accessories, and outdoor gear with online ordering and shipping options across the U.S.","email":"info@kygunco.com","foundingDate":"1946-01-01","hasMap":"https://www.google.com/maps/dir/?q=place_id:ChIJfwecWCBSaIgRguIjuoPha40","logo":"https://www.kygunco.com/logos/kygunco.svg","name":"KYGUNCO","priceRange":"$$","telephone":"+1-502-348-3594","url":"https://www.kygunco.com","@type":["Organization","LocalBusiness"],"address":{"@type":"PostalAddress","streetAddress":"401 Glenwood Drive","addressLocality":"Bardstown","addressRegion":"KY","postalCode":"40004","addressCountry":"US"},"contactPoint":{"@type":"ContactPoint","contactType":"Customer Service","telephone":"+1-502-348-3594","email":"info@kygunco.com","availableLanguage":"English","hoursAvailable":{"@type":"OpeningHoursSpecification","dayOfWeek":["https://schema.org/Monday","https://schema.org/Tuesday","https://schema.org/Wednesday","https://schema.org/Thursday","https://schema.org/Friday"],"opens":"09:00","closes":"17:00"}},"geo":{"@type":"GeoCoordinates","latitude":37.8032518,"longitude":-85.4252895},"hasMerchantReturnPolicy":{"@type":"MerchantReturnPolicy","name":"Standard Return Policy","inStoreReturnsOffered":true,"merchantReturnDays":30,"returnPolicyCategory":"https://schema.org/MerchantReturnFiniteReturnWindow","returnMethod":["https://schema.org/ReturnByMail","https://schema.org/ReturnInStore"],"returnFees":"https://schema.org/FreeReturn","refundType":["https://schema.org/ExchangeRefund","https://schema.org/FullRefund","https://schema.org/StoreCreditRefund"],"applicableCountry":"US"},"hasOfferCatalog":{"@type":"OfferCatalog","name":"KYGUNCO Catalog","url":"https://www.kygunco.com/search"},"image":{"@id":"https://www.kygunco.com/#/schema/image/1"},"knowsAbout":["Firearms sales and transfers","FFL dealers and compliance","Optics and accessories","Outdoor and hunting equipment"],"openingHoursSpecification":[{"@type":"OpeningHoursSpecification","dayOfWeek":["https://schema.org/Monday","https://schema.org/Tuesday","https://schema.org/Wednesday","https://schema.org/Thursday","https://schema.org/Friday","https://schema.org/Saturday"],"opens":"09:00","closes":"18:00"}],"paymentAccepted":["Credit Card","Credova","Sezzle"],"sameAs":["https://x.com/kygunco","https://www.facebook.com/kentuckygunco","https://www.instagram.com/kygunco","https://www.youtube.com/@thekentuckygunco","https://rumble.com/c/KYGUNCO"]},{"@id":"https://www.kygunco.com/product/strike-industries-enhanced-ar-15-lower-parts-kit-builders-kit#product","@type":"Product","description":"Enhanced AR-15 and AR-9 lower parts kit with extended pins, improved controls, springs, pins, and detents. Pistol grip and trigger components are excluded.","gtin":"708747544961","mpn":"SI-AR-E-LRPLT","name":"Strike Industries Enhanced AR-15 Lower Parts Kit","sku":"289758","additionalProperty":[],"brand":{"@type":"Brand","name":"Strike Industries"},"image":["https://cdn.kygunco.com/assets/products/289758/thumbnail.jpg?v=1750959415"],"mainEntityOfPage":{"@id":"https://www.kygunco.com/product/strike-industries-enhanced-ar-15-lower-parts-kit-builders-kit#webpage"},"offers":{"@type":"Offer","availability":"https://schema.org/InStock","price":53.95,"priceCurrency":"USD","url":"https://www.kygunco.com/product/strike-industries-enhanced-ar-15-lower-parts-kit-builders-kit","itemCondition":"https://schema.org/NewCondition","priceValidUntil":"2027-12-30T00:00:00.000Z"},"weight":{"@type":"Mass","value":"1 lb"}},{"@id":"https://www.kygunco.com/product/strike-industries-enhanced-ar-15-lower-parts-kit-builders-kit#breadcrumb","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","name":"Home","item":"https://www.kygunco.com","position":1},{"@type":"ListItem","name":"Shooting","item":"https://www.kygunco.com/category/shooting","position":2},{"@type":"ListItem","name":"Gun Parts","item":"https://www.kygunco.com/category/shooting/gun-parts","position":3},{"@type":"ListItem","name":"Handgun & Rifle Parts","item":"https://www.kygunco.com/category/shooting/gun-parts/handgun-and-rifle-parts","position":4},{"@type":"ListItem","name":"Rifle Parts","item":"https://www.kygunco.com/category/shooting/gun-parts/handgun-and-rifle-parts/rifle-parts","position":5},{"@type":"ListItem","name":"Lower Parts","item":"https://www.kygunco.com/category/shooting/gun-parts/handgun-and-rifle-parts/rifle-parts/lower-parts","position":6},{"@type":"ListItem","name":"STR-SI-AR-E-LRPLT","position":7}]},{"@id":"https://www.kygunco.com/#/schema/image/1","@type":"ImageObject","contentUrl":"https://cdn.kygunco.com/assets/backdrops/facade.jpg","inLanguage":"en","url":"https://cdn.kygunco.com/assets/backdrops/facade.jpg"}]} ``` ## Sitemap See the full [sitemap](https://www.kygunco.com/sitemap.md) for all pages.