Cutting oil will make life much easier for you and will preserve your tools. The first trigger (Stag Arms LPK) tried wouldn't rock back enough to allow the disconnect to release without pressing down on the trigger rear shoulder. No complaints. I am rocking the PSA MOE lower build kit, and have failed to replicate without live ammo, even through full function check. This is the bulk of the time since you’ll put on some cutting fluid (highly recommended), lower the bit to the next hashmark, start the router and put it into the pilot hole, then mill the pocket.. Another pro tip is to have your router on the highest speed and to make sure you start milling each time from the pilot hole. ( Log Out /  Check another (different) trigger in this lower. Cerakote or duracoat this is easy. The Ceratac Carbine Classic Kit 80% - 7.62X39 is a Popular choice for Hunting both White Tail Deer and Hogs.Just like the 556 version this kit the Carbine Classic Kit 80% - 7.62X39 is outfitted with a 16" Barrel and Adjustable Stock.It is lightweight, Maneuverable and capable of delivering Accurate Shots out to and Beyond 300 yards*. These Purple Anodized 80% Lower AR-15 receivers can be finished with the 80% Lower AR-15 Jig and held to tight tolerances by the DIY Gunsmith. You’ll then have to drill out the selector detent wall, with the JB Weld acting as the portion you over drilled. Create a free website or blog at WordPress.com. Here are solutions to common problems when making the perfect AR. If you don’t understand something don’t just guess. ( Log Out /  Cutting oil lubricates as you drill. Measuring from the front pivot pin hole, the trigger hole is from 3.927-4.067"+/- and .312" wide based on the center line. We provide the best deals around for 80 percent kits and parts while working to support the rights of the firearms industry. So I have milled and drilled 4 unique 80% lowers. If you are still nervous, 80% Arms has a hardened steel “stabilizer” which mounts to the side plate and doubles the amount of the drill bit supported to an equivalent of 1 1/2″ thickness. Luckily, it’s harder to ruin an Here are solutions to common problems when making the perfect AR. While they are a little more costly, they are often very high quality. Excessive cutting of the trigger area will weaken the receiver. Enjoy FAST SHIPPING and SAVE at 80-lower.com today! To fix that mare you’ll need a little refinish. Gen2 utilizes the same special composite/polymer blend as Gen1, lending itself to increased durability while remaining easy to mill. @92G the 80% lower is precut for the rear shelf as shown below but not big enough for the lug. 80 Lower Receivers: 5 Differences Between a Good and Bad Lower, ​80 Percent Lower Receivers: 5 Reasons to Complete Your Own, ​AR-15 Lower Receiver: This Single Product Will Officially Complete Your Build, 7 Upgrades to Your AR15Lower Receiver that Make a Big Impact, 5 Tips to Get the Most out of Your 80 Lower Receiver Build, Bits made for Metal. That little hump on the back of the MBT looks to minimize take up? A small slip is a big oops. Sometimes you can fix this is, but in some severe cases, it will be impossible to do so. Notice the solid area where the trigger would go, making it a paperweight, not a firearm. To get a clean, precise cut on your 80 lower with a handheld router and end mill bit, you'll need to mill your 80 lower using the highest allowable cutting speed. But, both give you a look and feel of a refined product that was designed and built for longevity. Let's be honest: the main reason for messing with an 80% lower is to have a gun "off the books." Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. On its product webpage, JMT calls out nine features of the Gen2 lower receiver: I can cock the gun and the seer holds the hammer fine. Install the selector, hammer doesn't release on safe which is good. Things to watch out for (But can be fixed)! Did all the combos, selector hole must have been fubar. Sorry, but a pair of Vice Grips will not work, unless you like a marred castle nut. Micrometer depth is still showing a few thousanths shy of 1.25". Marring the finish isn’t a big deal in terms of weapon operability. This will decrease performance and potentially ruin the bits and mills. On its product webpage, JMT calls out nine features of the Gen2 lower receiver: 80% AR Rifle/Pistol Lower Receivers FAQ What is an 80% Lower Receiver? Change ). This 80% non-functional and uncompleted trigger is for the gun hobbyist that likes to make their own gun components, with … At 80-lower.com, we are by no means providing this content on our website to serve as legal advice or legal counsel. The 80% project is almost complete. Too much friction and too much heat will melt the shards of aluminum to drill bits and to end mills. 80% lower it becomes a firearm and all local, state , and federal firearms laws apply. What Makes our Premium 80 Percent Lower, Well… Premium? Recently 80% Arms released a completely redesigned version of their original Easy Jig router-based system. From the time you start milling an 80% lower to the time you connect upper to lower you are at risk. I was able to quickly mount each into the jig and complete them without any problems. [ARCHIVED THREAD] - Trigger problem on 80% lower, https://www.AR15.Com/media/mediaFiles/413997/PXL_20201015_003457325_jpg-1636011.JPG. PSA kits will be available on July 3rd. I'm looking to build one more in 450 Bushmaster and I see no problems with using the EP lower. An 80 percent lower unfinished can’t fit a trigger or parts set, because it can’t be made to shoot. Carbon 50 AR-15 80% Lower; AR-15 80% Polymer Lower; Carbon 50 .308 80% Lower.308 Equalizer polymer lower; Saber Single Stage Drop In Trigger; Black OPS Single Stage Straight Drop in Trigger; AR Triggers Kits; Warranty; MANUALS; GALLERIES. This is the second lower I did with the 5D kit. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. I'm guessing my selector hole is a fuzz canted. 80% Lowers is a premier retailer and YOUR source for 80 percent lowers, 80% lower jigs, build kits and more. AR-15 FDE Rifle Kit 16″ Stainless Barrel 12″ /FDE Keymod Rail Handguard/ With FDE 80% Lower/ Black MAGPUL MOE Stock/ Black MAGPUL MOE Grip/ Enhanced Trigger Guard /- … I've put several thousand rounds thru each rifle and thesee lowers show no signs of wear. Do you have a non 80% build lower you can drop the MBT into and function check? The internet is an excellent source to check, especially Youtube. Check the trigger in another lower. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. Shop our AR-15 or 80% AR-308 complete lower receivers and kits to get all the parts you need to complete your custom build with precision. Check another (different) trigger in this lower.  Ultimate Polymer 80 Glock Troubleshooting Guide Today we're going to cover the common problems some people face with their Polymer 80 PF940C / PF940V2 Build. Making your own AR15 lower receiver from an 80%’er usually requires creating a fire control pocket and drilling three holes: two for the trigger and hammer pins, and one for the selector switch. Any use of this content without express written consent is prohibited. 0 Go. Apply either immediately, or brush scratches light with steel wool and then apply. Use a healthy dose of blue painter’s tape when assembling the magazine catch and assembly. Lower parts kit came with the newer ejector! AR-15 80% Lower. JMT ‘s AR-15 80% Polymer Lower (Gen2) is a prime example of intelligent humans thinking critically to produce a solid product. "We shall never return to social sanity till we begin at the beginning, where all history starts, with a man and a woman, and a child, and with the province of liberty and property which these need for their full humanity" -- G.K. Chesterton. Some people don’t even drill these holes, but I feel having a trigger guard makes for a safer firearm. Under the direction of another member here, an 80% lower was milled and the measurements given were faulty. Hi Bob, The design of your trigger pack is absolutely ingenious, installed easier than any of the other binary triggers I have, and have had zero issues so far. The safety selector switch is very tight on top of the back side of the trigger, and when I pull the hammer back, the disconnect … The first is a stop collar, also known as a depth collar. It’s an area that has a lot of questions that, without the correct answers, could have some serious implications. ... Login / Register. The hammer and trigger holes in mine were a little tight. Two things a lot of new 80% lower receiver makers will do is forget to use two invaluable milling aids!. 80% Lowers is a premier retailer and YOUR source for 80 percent lowers, 80% lower jigs, build kits and more. I refused to start over on a perfectly good lower. Operational problems with Palmetto State Armory lower receiver has been corrected with an updated 2 stage safety. An older 80% lower did not have this issue. I haven't looked at my prints, but I don't think that a little extra room in the trigger cavity will cause any problems as long at the safety lever has not been compromised. JMT ‘s AR-15 80% Polymer Lower (Gen2) is a prime example of intelligent humans thinking critically to produce a solid product. Enjoy easy and fast assembly for AR-15 and AR-308 with our 80% lower receiver kits. One big thing to remember is to stop and check the stop collar on occasion. You’ll need something like Aircraft Grade JB weld to fill the hole. I'm running a .223, .300 BO, 6.8 spc, and a 7.62x39. Anyway, issue is  installed the MBT-2 trigger, it functions fine without a selector installed. Anderson 80% lower, Anderson trigger with JP 3.5 lbs spring kit, Spikes LPK, Kaw Valley carbine buffer kit. 0 Go. When I load the file and run cam, it thinks I want to mill the lower out of a block of aluminum. This may have to become my 22 plinker later on. Both jigs look alike and have similar characteristics. Change ), You are commenting using your Twitter account. Your selector hole is a little off. Instead of listing all the wrong tools you can use, let’s list all the right ones. This is exactly what our 80% lower jig for 80 percent lower kits and custom tools help you do. This is number one on the list because it is the most common issue when finishing an 80% lower. Make sure and deburr your fire control and selector holes after drilling. Drilling too deep into your 80% lower presents some really big problems. As long as the trigger spring doesn't fall out of the hole it should still function. Regardless of that, the Bureau of Alcohol , Tobacco, and Firearms (ATF) does not legitimately see 80 per cent lower as forms of weapon receiver blanks. If you cut into the trigger area and fear weakening the receiver use some form of epoxy to sell in where you drilled. Specifications: Hole Sizes: Selector Pin Hole: 3/8” (0.375”) Trigger Pin Hole: 5/32” Some people don’t even drill these holes, but I feel having a trigger guard makes for a safer firearm. AR15.COM is the world’s largest firearm community and is a gathering place for firearm enthusiasts of all types. Most handheld routers operate at 2,000 to 30,000 RPM. Easily finish our 80% AR-15 or AR-10 lower receivers to fully working receivers with our 80% Lower Jigs. If you want a quality outcome, even an inexpensive 100% lower will be better than an 80% lower that you finish yourself. A small brass hammer is perfect because it is non-marring to aluminum. Hey guys, I just completed my 80% lower Ar15 build and I absolutely love it. MENU MENU. Depth of trigger pocket on both lowers are nearly identical. Tags: 80% Lower Receiver, gun guy thoughts, Polymer80, Ruined, STOP the madness Let’s face the facts, it isn’t hard to ruin something if your primary tool of destruction is a Dremel. This prevents the drill from going deeper that required. I can "wiggle" the hammer and trigger and the hammer is solid will no disengage. It went binary on 4 trigger pulls out of 50 rounds. You Completed Your AR 15 Lower Receiver, Now What? The combos, selector hole is a gathering place for firearm enthusiasts of all.. Or parts set, because it is your responsibility to check the legality of finishing an 80 % build you. When I load the file and run cam, it thinks I to. 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With my LaRue UU kit comes to installing a lower parts kit came with the drill from going deeper required... Still does n't fall out of the receiver when the AR-15 functions, in. For one of the 5D kit the bits and to end mills,! % Arms walls are cut too wide your trigger may slide left right. 1.249, diff of 0.006 '' hammer does n't release on safe which is.... Milled and the 80 % lower receivers... a good example of is... Eighty per cent slight margin AR lowers to GhostGlocks.com and our reviews of fire...: //www.AR15.Com/media/mediaFiles/413997/PXL_20201015_003457325_jpg-1636011.JPG trigger area and fear weakening the 80% lower trigger problems when the material is versus! Of their original easy Jig gen 2 for AR15 and AR10 and checkout process I...