This is a polymer block with a pin at one corner and a hole in another, it makes it easy to install your trigger guard without risking hurting your receiver. Then, fit your trigger guard to your receiver body and slip the assembled pieces onto the pin in the block. The hole in the opposite corner will allow you to drive the pin out if you need to remove your trigger guard later. To begin, insert the little end of the bolt catch plunger into the spring and put them in the correct opening in the left side of the receiver.
The spring should go in first, leaving the larger end of the plunger toward the outside. The next step requires you to place the bolt catch between the receiver tabs with the paddle on top. Well, here it is, you need your razor blade or box cutter along with a pair of needle nose pliers to place your pivot pin and pivot pin detent. Insert the pivot detent spring in the hole at the front of your AR lower receiver.
Use the needle nose pliers to place the detent down on the spring. Keep a little pressure on that detent with the blade while you slide the pivot pin in. It should clear the blade nicely and engage the detent. Try to slide it out. Begin by putting your receiver back on the vise block where you started out.
Install your trigger spring by slipping one side of the spring over each of the raised shoulders of the trigger. When you put the trigger into the receiver the spring legs will be turned underneath and face the front of the receiver.
The holes in the side of the disconnector should be aligned with the corresponding holes in the trigger when it is depressed against the disconnector spring. Once your trigger group assembly is complete you should test it, making sure there is fairly strong tension on the spring and that the disconnector is moving properly along with the trigger. The hammer simply drops into place with a leg of the hammer spring placed into either notch on the trigger retaining pin. With steady downward pressure on the hammer, apply the roll pin punch to the hammer and receiver to keep the parts aligned in the same manner that you used it when you assembled the trigger.
Since everything is held in place, inserting the hammer retaining pin will be straightforward operation just as the trigger pin installation was. This pin may require a little extra encouragement to find home because the spring is under a bit more tension. Use a small brass hammer to tap the pin in place while keeping things in line, but carefully allow the pin to move into place.
Testing your hammer installation by pushing the hammer down until it is caught by the disconnector. The hammer should stay cocked until the trigger is activated.
When you pull the trigger, the hammer should fall against your hand. Hold tension against the trigger, cock the hammer once again and release the trigger. The hammer sear should have caught the trigger so the hammer remains in the cocked position. This step requires the safety selector , the safety selector detent , the corresponding safety selector detent spring , your pistol grip , the pistol grip screw, lock washer and a standard flathead screwdriver.
You should have left the hammer back at the end of the last step. Working from the left side of the receiver first, place the safety selector in the proper hole in the receiver. Then, place the safety selector detent spring in the small hole on top of the pistol grip. Place the lock washer and pistol grip screw in the mounting hole in the grip. Snug that screw down to fully secure your pistol grip, thereby securing the safety selector detent.
Real time inventory. No backorders. The LPK includes all the parts necessary to chamber a round, flip the safety, squeeze the trigger, and fire a round downrange using your AR lower. All lower parts kits include the following components for assembling the lower receiver, ordered alphabetically:. To complete the AR lower parts kit install, you will also need a castle nut and latch plate. These two components are not usually included with the LPK but they are required for securing the safety lever detent and spring, and the buffer tube.
They typically come with your tube or buttstock assembly instead. An LPK and buttstock combo kit is available. If you already have a parts kit, simply grab the buttstock, tube, nut and plate here. Want to throw more lead downrange with your black rifle? Popular Brands. Featured Parts. Aero Precision M5. Deals View All. Expert Picked: Tactical Gear. Find a Great Gift for Builders. Filter by:. Made in USA. Customer Reviews. Related Links. Navigate to: Brands.
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