{"id":107466,"date":"2019-03-26T11:07:21","date_gmt":"2019-03-26T15:07:21","guid":{"rendered":"https:\/\/www.gunsamerica.com\/digest\/?p=107466"},"modified":"2019-03-26T11:07:21","modified_gmt":"2023-09-05T20:34:50","slug":"ar-15-trigger-installation","status":"publish","type":"post","link":"https:\/\/gunsamerica.com\/digest\/ar-15-trigger-installation\/","title":{"rendered":"DIY: AR-15 Trigger Installation – RISE Armament Drop-In Assembly"},"content":{"rendered":"
\"DIY:<\/a>

Upgrading your AR’s trigger is the simplest and most impactful change you can make to your AR. I’m using a RISE Armament drop-in assembly.<\/p><\/div>\n

Upgrading your trigger is the most impactful change you can make to your AR. There are all kinds of cool furniture upgrades, scopes, sights, etc. But if you want to be more accurate and shoot better, then trigger work is the thing to do–and it’s not that costly. A drop-in trigger assembly is easy to install and can be done at home with a screwdriver and a little oil.<\/p>\n

Choose a Trigger<\/h2>\n
\"DIY:<\/a>

A drop-in trigger is fully contained in a machined housing. The RA-140 comes with anti-walk pins.<\/p><\/div>\n

Many manufacturers offer drop-in trigger assemblies. You can pick and choose features and weights. Look for things like singe- or two-stage triggers, the weight of pull, and the shape of the bow (curved, flat, roller). I’ll show you how to do this using a trigger from RISE Armament, the RA-140 Flat Super Sporting Trigger<\/a>, which they sent me for review. It’s a good option, with a mild price-tag (MSRP $139) and it’s a significant upgrade to the mil-spec trigger assembly I had before.<\/p>\n

The RA-140 includes anti-walk pins, and whatever trigger you choose is going to need them, too, so be sure to buy them or get them included. I’ll explain why below.<\/p>\n

1. Remove the Upper Receiver<\/h2>\n

Clear the gun and remove the upper receiver. It’s simple to do and may not require a tool. First, with the left side of the weapon up, push the takedown pin through, then tilt the upper forward and push the pivot pin through. Both of these pins are kept in place with a detent and won’t fall out.<\/p>\n

\"DIY:<\/a>

First, push the takedown pin through, then tilt the upper forward and push the pivot pin through. Don’t worry, the pins won’t fall out.<\/p><\/div>\n

\"DIY:<\/a>

With the upper removed, you can see the trigger hammer. It’s cocked in this picture–don’t let it slam forward against the bolt release.<\/p><\/div>\n

2. Remove the Grip and Safety Switch<\/h2>\n

Now, look up inside the grip from underneath and you’ll see a hex-head screw–it’s probably a 3\/16″ hex. Remove this screw, and don’t lose the washer.<\/p>\n

\"DIY:<\/a>

Use a 3\/16″ Allen wrench and remove the screw from inside the grip. Yours probably has a washer, too.<\/p><\/div>\n

Separate the grip from the lower receiver, but be careful not to lose the\u00a0spring and detent that are on the right side of the weapon. The detent keeps the safety switch in position, and the spring allows it to click back and forth.<\/p>\n

\"DIY:<\/a>

Remove the grip, but don’t lose the spring and detent on the right side of the weapon. These keep the safety switch in position.<\/p><\/div>\n

\"DIY:<\/a>

The safety spring and detent are small–don’t lose them!<\/p><\/div>\n

Now just pull the safety switch out.<\/p>\n

\"DIY:<\/a>

Now the safety switch comes out freely.<\/p><\/div>\n

3. Push the Trigger Pins Out<\/h2>\n

With the left side of the weapon up, push the trigger pins through. These are a little stiff at first, but they don’t take too much force. You can use a punch to push them or a screwdriver, or even a pencil with a broken lead.<\/p>\n

\"DIY:<\/a>

Now push the two trigger pins through from the left side to the right side.<\/p><\/div>\n

You’ve got to push from left to right because the pins are held in place by grooves which the trigger spring is set into. Before you finish pushing the pins through, put your thumb over the trigger assembly to keep it from flying apart when you remove the pins. Remove the mil-spec trigger assembly.<\/p>\n

\"DIY:<\/a>

The trigger spring sets into those grooves on the pins.<\/p><\/div>\n

\"DIY:<\/a>

Put your thumb over the trigger assembly to keep it from flying across the room when you remove the pins.<\/p><\/div>\n

This Is Why You Need Anti-Walk Pins<\/h2>\n

Those grooves on the trigger pins have a spring set against them and that tension keeps the pins from falling out of the receiver. With a drop-in assembly, there isn’t a spring pushing against those pins to keep them in place, only their tight fit inside the gun. Anti-walk pins have screws that cap the ends of the pins to keep them in place.<\/p>\n

\"DIY:<\/a>

Spring tension keeps the mil-spec pins from moving, but there is no tension with a drop-in assembly. Make sure you get Anti-Walk pins with your drop-in trigger.<\/p><\/div>\n

4. Drop-in and Pin the New Trigger<\/h2>\n

Now you just need to drop in the new trigger assembly and pin it in place. Take a moment to clean the housing of any grit and excess oil. The trigger assembly may fit pretty tightly. My Sun Devil Mfg. receiver is machined from an aluminum billet, and it’s precisely shaped. The trigger assembly is also machined to a precise fit, and I had to add a little oil and coax it with light tapping to get it lined up so I could insert the trigger pins. It may be a little easier on stamped receivers, and take care with polymer receivers. But, the trigger fits snugly and there is no play between the receiver and the trigger assembly.<\/p>\n

\"DIY:<\/a>

Drop in the trigger assembly and pin it in place. You may need to add a little oil to and use some light tapping to get the assembly to line up.<\/p><\/div>\n

\"DIY:<\/a>

This is the new drop-in trigger installed. It’s a tight fit, as it should be.<\/p><\/div>\n

5. Install the Anti-Walk Pins<\/h2>\n

Remember to use the screws to keep the trigger pins from walking out. The screws are just caps, and they overhang on both sides of the pins so they go one way or the other. They do not tighten against the receiver, and that’s normal–they shouldn’t apply any squeezing pressure to the receiver.<\/p>\n

\"DIY:<\/a>

Install the screws in the anti-walk pins.<\/p><\/div>\n

\"DIY:<\/a>

Use two wrenches to tighten both sides at the same time and note that the screws don’t tighten against the body of the receiver. My trigger included the wrenches.<\/p><\/div>\n

6. Replace the Safety and Grip<\/h2>\n

Put the safety detent back inside the right side of the weapon and see how it keeps the safety switch in place. Press it down flush with the hole for the switch and put the switch in place. Make sure the switch is either in the Safe or Fire position so the detent will line up.<\/p>\n\"DIY:<\/a>\n

Now put the spring back into the hole in the grip and line it up with the detent hole. Put the grip back in place and secure with the grip screw.<\/p>\n

\"DIY:<\/a>

Put the spring back in the grip and line it up to fit back into the detent hole. Secure the grip back in place with the grip screw.<\/p><\/div>\n

 <\/p>\n

\"DIY:<\/a>

Just put the upper back on and you’re all set.<\/p><\/div>\n

Go Shoot!<\/h2>\n

The new trigger should be lighter and tighter and you need to get used to it. Get out there and start shooting. I bet your groups are tighter and you’re more precise overall. At just 3.5 pounds, I like the feel of this new RISE Armament trigger, and I’ll have a complete review for you soon. Whatever you choose, your new trigger should be a big improvement over the 7-10 pound mil-spec trigger assembly and, as mentioned, it’s the best upgrade you can make for your rifle!<\/p>\n

***Buy and Sell on GunsAmerica!<\/a>***<\/h2>\n","protected":false},"excerpt":{"rendered":"

Upgrading your AR’s trigger is the simplest and most impactful change you can make to your AR. I’m using a RISE Armament drop-in assembly.<\/p>\n","protected":false},"author":100,"featured_media":107467,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_specdata_upc":"","_specdata_placement":"","footnotes":""},"categories":[7,234,72,1348],"tags":[110,613,132,586,201,343,1668,328],"featured":[],"hunt365":[],"class_list":{"0":"post-107466","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-gunsamerica-authors","8":"category-columns","9":"category-columns-gunsmithing","10":"category-levi-sim","11":"tag-accessories-2","12":"tag-ar-15","13":"tag-buzz","14":"tag-column","15":"tag-diy","16":"tag-rifle","17":"tag-rise-armament","18":"tag-trigger"},"yoast_head":"\nDIY: AR-15 Trigger Installation - RISE Armament Drop-In Assembly<\/title>\n<meta name=\"description\" content=\"Here's how to install a new trigger into your AR-15. 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