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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
Building AR for long range
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<blockquote data-quote="ntsqd" data-source="post: 2174355" data-attributes="member: 93138"><p>I don't have any understanding for why upper to lower fit needs to be tight. There's likely a good reason that I'm missing (other than user confidence in the firearm), but to my way of thinking the important part is the upper's fit to the barrel and the BCG as all of the important interactions happen there. </p><p></p><p>None the less, a couple of my builds have featured that little polymer wedge. There a few vendors who offer a drilled & tapped grip screw with a set screw in the center of it. Running the set-screw out when assembled takes any vertical slop out of the upper to lower fit. I *think* that I have one somewhere, but I've not tried it.</p><p></p><p>I've used a Seekins IRMT-3 monolithic upper/handguard on a couple builds with good results. I used them specifically to get the flat bottom on the handguard. Other builds I've used Aero or a generic thick walled uppers with Apex Gator Grip handguards.</p></blockquote><p></p>
[QUOTE="ntsqd, post: 2174355, member: 93138"] I don't have any understanding for why upper to lower fit needs to be tight. There's likely a good reason that I'm missing (other than user confidence in the firearm), but to my way of thinking the important part is the upper's fit to the barrel and the BCG as all of the important interactions happen there. None the less, a couple of my builds have featured that little polymer wedge. There a few vendors who offer a drilled & tapped grip screw with a set screw in the center of it. Running the set-screw out when assembled takes any vertical slop out of the upper to lower fit. I *think* that I have one somewhere, but I've not tried it. I've used a Seekins IRMT-3 monolithic upper/handguard on a couple builds with good results. I used them specifically to get the flat bottom on the handguard. Other builds I've used Aero or a generic thick walled uppers with Apex Gator Grip handguards. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
Building AR for long range
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