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Posted: 3/22/2011 8:37:28 PM EDT
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Last week on a new Louis Machine 14.5 upper I tried to move my Eotec forward on the rail above the barrel, Found the sight centered well off from where it was on the receiver.
Talked to my favorite gunsmith, and he suggested tearing the upper down, and trueing the barrel to the upper. I had never considered this important in an AR. What are the opinions here? |
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Quoted:
Last week on a new Louis Machine 14.5 upper I tried to move my Eotec forward on the rail above the barrel, Found the sight centered well off from where it was on the receiver. Talked to my favorite gunsmith, and he suggested tearing the upper down, and truing the barrel to the upper. I had never considered this important in an AR. What are the opinions here? First off, congrats on your first post. Second - It's spelled as "Lewis" Machine (& Tool Company) or simply "LMT", not "Louis"... Thirdly - your trouble-description needs a little more product clarification... What type of rail system is mounted on the weapon? (Monolithic? Aftermarket? Free-float or Non-free-float? One-piece, two-piece, or is it part of the actual receiver) Does the weapon use a standard fixed front sight base, or does it have a gas block mounted instead? When you say "the sight is centered well off", are you referring to the Eotech's sight picture in relation toward the physical front sight of the weapon, or a point of impact shift experienced when it's fired with the Eotech mounted in each location? Your answers to these questions will help us to better determine the problem & identify possible solutions. Hope this helps... |
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All right I will get it right.
1st the forearm is CAA X6 Six Rail Picatinny Handguards http://www.botachtactical.com/tdix6.html I pulled the upper apart today, and did true everything It was about .004" our of true. Found a minor problem with the sight mount and fixed it. \\ Tomorrow I will sped some time at the range, and reset my zero. This is the upper I purchased. http://www.botachtactical.com/lmtco14uprea.html Next week I will be at Okanogan, WA at the Redback One Tactial carbine course on the LEO range. : this course will focus on two key aspects of combat marksmanship: weapon handling skills and marksmanship fundamentals. Course Objective: -Fundamentals brief -Core skills assessment -Ready positions -High and low percentage targets -Presentation time and set time -Enhancing the draw -Diagnostic assessments -Multiple targets -IA’s and stoppages -Combat and tactical reloads -Transitioning to pistol -Turns and pivots -Shooting on the move -Combat sight picture -Recoil management -Target priority -Use of cover -Final evaluation and assessment Student Prerequisites: Equipment required: -Positive, winning attitude -Zeroed carbine with 5 magazines (minimum), mounted white light, sling and mag pouches -Handgun with 3 magazines (minimum), holster and mag pouches -300 rounds handgun ammunition -1000 rounds carbine ammunition -Hand held white light I have competed in IPSC some years ago, and also did 3 gun matches. Most of my recurrent training has been with pistol or shotgun. This will be the 1st time I have really put my AR through the paces. When I shot 3 gun, it was with a HK 91. I admit I am a bit anal about having equipment that I have complete confidence in. I want it to be just an extension of me when I shoot. I really hope this exercise will marry the AR15 to me. Either my Glock 20c or 1911 are that way as is my Bennelli shotgun. |
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Most shooters will likely tell you that non free-floated, drop-in handguard is not the proper option to mount an optic. Such handguards index off the barrel nut and that nut is often not precisely aligned. on top of that, that mounting system typically allows a bit of movement, however small that might be. I would suggest that you leave it on the receiver. Now, lights, a vertical grip, and the like, are perfectly fine on a drop-in handguard.
Sounds like a really fun course! |
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