Monthly Archives: March 2011

News, Notes, and Coming Soon…

There’s a lot going on ‘under the covers’ and I thought I’d let you in on some of it.  The following posts are all being worked on: Continuing the .45 AR build – using QuickLoad to calculate gas port location … Continue reading

Posted in Notices | 1 Comment

Designing a Gas-Operated Pistol Caliber AR-15.

Let’s design a gas-operated AR-15 in .45 ACP.  Obviously that means starting with an AR-15, so much of the design is done already. Because the system will be gas operated, and therefore have positive locking, it should be able to … Continue reading

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Building an AR-15 in .458 SOCOM

  There are several choices for those wanting a big bore in an AR-15.  The .458 Socom uses the ubiquitous .458 bullet – the same bullet used in the .458 Winchester – so there exists a great selection of suitable … Continue reading

Posted in Firearm Design, Gunsmithing | 1 Comment

Chambering and Installing an AR-15 Barrel

The following documents the build of an AR-15 upper chambered for the .300 Whisper, also called the .30-221 Remington or .300-221.  This build utilizes a factory-made upper receiver frame (the same one used for .223), so the predominate focus is … Continue reading

Posted in Gunsmithing, Shop work | 3 Comments

Making a Floating Reamer Holder for Chambering Barrels

First, as always, gather your materials.  You’ll need: A piece of scrap ~3″ long by 3/4″ diameter One ball bearing, as close as you have to 1/2″ is handy.  You can adjust this to any size over about 3/8″ – … Continue reading

Posted in Gunsmithing, Shop work | 2 Comments