Upgrade the function and quality of your weapon with these convenient Strike Industries AR Enhanced Lower Receiver Parts with Trigger, Hammer & Disconnect. This bundle of AR15 Lower Parts from Strike Industries includes their fire control group with a crisp 4.5-5.5 lbs. of pull for a smoother trigger experience. The trigger and hammer are also precision cut and phosphated for durability and resistance against corrosion and wear. This Strike Industries AR Enhanced Lower Parts Package w/ Trigger, Hammer & Disconnector also comes with an enhanced bolt catch with improved grip surfaces and angles to help you deliver your best performance in the field. You get all of the basic necessities besides a grip with this kit, but the quality of each part is anything but ordinary. Trust the Strike Industries AR Enhanced Lower Parts Kit with Trigger, Hammer and Disconnector to boost the efficiency of your firearm while lasting longer than other parts.Specifications for Strike Industries AR Enhanced Lower Receiver Parts with Trigger, Hammer and Disconnector:Manufacturer:Strike IndustriesColor:BlackGun Make:AR PlatformGun Model:AR-15Weight:2.9 ozCondition:NewFeatures of Strike Industries AR Enhanced Lower Receiver Parts with Trigger, Hammer & Disconnect:Includes all the basics that you will need to build out your AR (minus grip)Includes SI's signature Enhanced Lower Parts (AR-EBC, New improved SI-SMC, AR-EPTP, & AR-HS-60/90-3in1)SI's Trigger Springs provide a consistent 5.5 1/2 to 8 1/2 lbs trigger pull with our fire control groupPackage Contents:Strike Industries AR Enhanced Lower Receiver Parts with Trigger, Hammer and DisconnectorEnhanced Bolt Catch features improved grip surfaces and anglesStrike Magazine CatchStrike Magazine Catch ButtonEnhanced Pivot Pin longer of the two large pins.Enhanced Takedown Pin smaller of the two large pins.SI Selector Lever 2 included in packageSI Selector End PlateSI 6090 3in1 Selector Shaft with screwsBolt Catch Spring easily confused with the disconnector spring disconnector spring is tapered though.Buffer Retainer Spring second largest coil type spring in the kit.Disconnector Spring slightly larger than boltcatch spring identifiable because one end is a little bit wide than the other.Hammer Spring largest of all the springs.Magazine Catch Spring this is the largest coil spring in the kit.Pivot Detent Spring same as the takedown detent spring so there are two in a kit.Selector Spring similar to the takedown and pivot detent springs but larger diameter there will only be one of these.Takedown Detent Spring same as the pivot detent spring so there are two in a kit.Trigger Spring the smaller of the two largest springs.Bolt Catch Plunger mushroom shaped pinBolt Catch Roll Pin smaller of the two roll pins.Hammer Pin solid pin with machined grooves can be inserted from either side.Pivot Detent same as takedown detent both sides usually rounded or semiconical.Selector Detent one end is flat the other pointed/semiconical.Takedown Detent same as pivot detent both sides usually rounded.Trigger Pin same as hammer pin can be inserted from either side.Buffer Retainer large hollow barrel with small pin protruding from the topTrigger: Investment cast trigger CNC machined heat treated phosphated precision groundHammer: Investment cast hammer CNC machined heat treated phosphated precision groundStrike Industries SI-AR-E-LRPTH: AR Enhanced Lower Receiver Parts with Trigger, Hammer and Disconnector, Black, One Size