The Builder’s Bench

Kaboom! The Story behind the Picture

From the AR15.com Discussion Forum: “Would not believe it if I hadn’t seen it! We were shooting our monthly offhand, winter fun shoot, when I heard the line officer yelling “cease fire, cease fire”. One of the shooters had a MAJOR malfunction!! When I approached, I found an AR with

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Which height ARMS Scope Rings should I use?

Which height ARMS Scope Rings should I use with my ______________ scope on my flattop receiver, Swan Sleeve or other Swan/Weaver Rail on my AR-15 or Fulton Armory FAR-15? by Walt Kuleck I am considering buying a set of the ARMS 30mm quick-detachable steel scope rings that you offer under

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“Drop Free” Magazines 

How do I get my magazines to “Drop-Free”? by Walt Kuleck I find that some magazines, particularly 20-rounders, don’t “Drop Free” from the mag well when I hit the magazine release. I need quick mag changes for rapid fire stages. What should I do? As documented in The Black Rifle by Stevens

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ONE MORE TIME: WHY NOT A GAS PISTON AR?

Yep, the horse be dead, long live the horse. Note that when we talk of “gas piston systems” for AR-type rifles, we are gathering a number of disparate principles under the tent. You can have long-stroke such as found in the Garand and AK, short stroke as in the SKS,

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Slam Fires, Mags & SLEDs; Clint speaks out!

by Clint McKee In my humble opinion, all self loading, gas operated, mag fed/clip fed rifles should be mag fed or clip fed, as appropriate. Sometimes, it’s just so simple. Why, you ask? Because they were designed to be fed that way! Gas guns are self loading rifles. Thus, bolt velocities

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Technical Inspection Report

Second “New-Receivered” Garand Presented without (much) comment Technical Inspection Report Receiver Markings; IHC on left, New Receiver on right. This appears to be a casting. This receiver will not enter a USGI stock, even a well-used one. Op rod track edge;Note the change in contour from rear to front. What

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Technical Inspection Report

“New-Receivered” Garand Presented without comment Technical Inspection Report Receiver Markings Receiver Breech Barrel BreechWhat is this stuff on the threads and shoulder?The barrel was little more than hand-tight! Barrel LegendThe Throat Erosion is 1.0! Upper Right Side Receiver View Closeup of Right Receiver RailNote the workmanship! Comparison with USGI Receiver

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Comparing the M14 and BM 59 Magazines

For those curious about the differences between M14 and Beretta BM 59 Magazines. The M14 magazine “rocks” into place. That is, you insert it by pushing it top front edge in the front of the well first (and briskly), then “rocking” the rear of the magazine up until it catches

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