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Posted: 8/19/2005 11:16:30 AM EDT
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Hey everyone I am building my first 9mm AR carbine. I plan to have it registered as a SBR. My question: what lower receiver should I get? I want something strong and I don't mind paying for quality. I am not going with Colt. I was thinking bushmaster, but I want to make sure the lower I purchase will fit with a 9mm upper and stein mag conversion. Thanks for the help. Sincerely Ian |
| I ordered mine from Lauer Custom Weaponry(shipped to my FFL). They also do engraving, so I had them engrave my name, city, and state on the front of the magwell. Some say that when you submit your Form 1 you have to engrave that info on it, others say you don't, but I had them do it just to be safe. About any forged lower will do though. |
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You want to make sure you start off with a MIL SPEC forged lower......MANY, MANY, receivers are NOT and have incorrect mag wells.......this is especially important since you will be using an adapter in them. Since everyone and thier pet monkey is making receivers....or having thier name carved in them.....choose a manufacturer that has a good reputation that stands behind thier product. If you want to see a drawing of the what a magazine well should be..........magwell dimensions |
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The dedicated Hahn block looks good. The removal/instalation of the bolt catch is not very hard. I like the bottom inserted units (they hold the bolt open) better than the top inserted ones. I would recommend using Colt mags. As far as lowers are concerened, there are many good mfgs. However, I'd go to a lower marked "9mm" rather than 223. I believe Ameetec, Superior and Mega have them, perhaps others - I went for a Colt 9mm lower. I'd also recommend getting your bolt ramped. |
It looks like you are planning on using a Olympic 9mm upper, so why don't you use a Olympic lower. I got a Oly 9mm upper during the ban that I used on my preban shorty. I had also bought a Oly lower during the ban that I never built into a rifle. So, after the ban, I built it up for my 9mm upper. It went together just fine and the finish matched, as well. Just be sure you get two things. Get a mag block so you can use unmodified Sten mags, and a Sten mag loader. (Your fingers will love you for it.  )Vulcan94 |
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I got a Bushy Lower with an Oly upper for my 9mm SBR setup. There are pictures and a range report here. Let me know if you want any more information. Hope this helps, Debo  |
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