Armaspec Stainless Steel Gun Builder’s Lower Parts Kit less Trigger Group & Grip for .223/5.56 . If you are looking for a high end gun builder's kit, than this one is for you. It incorporates all the great products from Armaspec in one package. Fits AR 5.56/.223 Made in U.S.A Lifetime Warranty INCLUDES: Armaspec SFT 45/90 Safety Selector Bolt Catch Enhanced Take Down Pin Stainless Steel Takedown detent Takedown Detent Spring Enhanced Pivot Pin Stainless Steel Pivot Detent Pivot Detent spring Stainless Steel Anti-Walk Trigger Pin Stainless Stainless Anti-Walk Hammer Pin Stainless Steel Buffer Retainer Magazine Catch Magazine Spring Enhanced Magazine Release Button Stainless Steel Bolt Catch Detent Stainless Steel Safety Selector Detent Bolt Catch Roll Pin Bolt Catch Spring Buffer Retainer Spring Selector detent spring Hex Keys for Anti-Walk Pins Note: This is “NOT” a complete lower parts kit. This is a builder’s kit. This Kit does not include the Pistol Grip, Pistol Grip Screw and Washer, Trigger and Hammer, Trigger and Hammer Springs, Disconnect, Disconnect Spring, Trigger Guard and Roll Pin.