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Kids and Grendels
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<blockquote data-quote="Turpentine21" data-source="post: 2939009" data-attributes="member: 124909"><p>I used a 20" Wilson Arms 1 in 8" in my first one. That was a mistake. It will shoot ok but it has been incredibly finicky. Finally put a tuner brake on it to make it a little more accurate.</p><p>For the last two I used Alexander Arms 20" 1 in 9" heavy fluted barrels with either Aero or Anderson uppers and Alexander Arms bolts. Both are being shot without muzzle brakes. Slim hand guards. Extremely accurate. I built another for a customer with a AA 18" fluted mid gas in 1 in7.5 or 8. Can't remember. All other parts were Aero. Very light package. I use Magpul ACS-L stocks exclusively. Aero enhanced buffer tubes.</p><p>If you plan to use a 20" barrel, go with a 9 twist. That will seriously narrow down your choices but will pay off. This advice comes from Bill Alexander's early tests with barrels and twist rates. Alexander Arms and Lilja make the 9 twist barrels. 18 or below use 1 in 8" or below. I have found that th AA barrels and bolts generally don't require an adjustable gas block to shoot and eject well. Bill did his homework on port size. You can use different buffer weights to tune if necessary. If I were going to use a suppressor however I would use an adjustable block.</p><p>I personally only use Geisslee 2 stage match triggers unless the person I'm building for wants something different. Trigger tech now makes an interesting option and Larue is certainly hard to beat for the money. I've used Aero, Anderson, Palmetto, and Del-ton lowers. No issues with any of them. I like Aero or AR stoner slim handguards. Nothing fancy but they work.</p><p>I also tune every Grendel Mag I get as soon as it comes out of the package. Makes them a lot more reliable.</p><p>My last personal build is one of the 20" AA 1 in 9 barrels.</p><p>With 27.7 grains of AR comp, federal 205ar primer and a 123eldm it will shoot .3 or less 5 shot groups at 100. I've seen very few Grendel's that wouldn't shoot this load extremely well for some reason. Usually anywhere from 27.5 - 27.9 shoots very well with 27.7 being the best. Runs about 2500fps. Leverevolution can add 100fps but I can't get the accuracy out of it In my guns.</p></blockquote><p></p>
[QUOTE="Turpentine21, post: 2939009, member: 124909"] I used a 20" Wilson Arms 1 in 8" in my first one. That was a mistake. It will shoot ok but it has been incredibly finicky. Finally put a tuner brake on it to make it a little more accurate. For the last two I used Alexander Arms 20" 1 in 9" heavy fluted barrels with either Aero or Anderson uppers and Alexander Arms bolts. Both are being shot without muzzle brakes. Slim hand guards. Extremely accurate. I built another for a customer with a AA 18" fluted mid gas in 1 in7.5 or 8. Can't remember. All other parts were Aero. Very light package. I use Magpul ACS-L stocks exclusively. Aero enhanced buffer tubes. If you plan to use a 20" barrel, go with a 9 twist. That will seriously narrow down your choices but will pay off. This advice comes from Bill Alexander's early tests with barrels and twist rates. Alexander Arms and Lilja make the 9 twist barrels. 18 or below use 1 in 8" or below. I have found that th AA barrels and bolts generally don't require an adjustable gas block to shoot and eject well. Bill did his homework on port size. You can use different buffer weights to tune if necessary. If I were going to use a suppressor however I would use an adjustable block. I personally only use Geisslee 2 stage match triggers unless the person I'm building for wants something different. Trigger tech now makes an interesting option and Larue is certainly hard to beat for the money. I've used Aero, Anderson, Palmetto, and Del-ton lowers. No issues with any of them. I like Aero or AR stoner slim handguards. Nothing fancy but they work. I also tune every Grendel Mag I get as soon as it comes out of the package. Makes them a lot more reliable. My last personal build is one of the 20" AA 1 in 9 barrels. With 27.7 grains of AR comp, federal 205ar primer and a 123eldm it will shoot .3 or less 5 shot groups at 100. I've seen very few Grendel's that wouldn't shoot this load extremely well for some reason. Usually anywhere from 27.5 - 27.9 shoots very well with 27.7 being the best. Runs about 2500fps. Leverevolution can add 100fps but I can't get the accuracy out of it In my guns. [/QUOTE]
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