Eurooptic vortex burris nightforce sale




teslong borescope digital camera barrel monitor


As an Amazon Associate, this site earns a commission from Amazon sales.









February 10th, 2026

How AR-Platform Rifles Work — 3D Cutaway Animation

ar-15 AR15 3D animation video youtube cutaway 5.56 AR .233 Rem

Ever wondered how the parts inside an AR15 work together? Just exactly how does the reciprocating bolt carrier feed rounds from the magazine? How do the elements in the trigger group work and reset after each shot? How does the gas system bleed gas from the barrel and operate the bolt carrier? These and other questions are answered in this eye-opening video from 45Snipers. Using “cutaway” 3D computer animation, this 5-minute video shows all features of an AR15 inside and out. This fascinating firearms animation allows the viewer to look inside the upper and lower receivers, into the bolt carrier, chamber, barrel, and magazine.

This video starts off slow and has annoying background music, but it is well worth watching if you own or shoot any AR-platform rifle. It illustrates all the key operations during the charging, loading, firing, and ejection processes. The cutaway animation shows how rounds are stripped from the magazine and then chambered. It then shows how every part of the trigger group works, and how the firing pin strikes the primer. You can even watch the bullet move down the barrel before the empty shell casing is removed from the chamber and tossed out the ejection port. Here are sample frames from the video:

ar-15 AR15 3D animation video youtube cutaway 5.56 AR .233 Rem

ar-15 AR15 3D animation video youtube cutaway 5.56 AR .233 Rem

Video find by Grant Ubl. We welcome reader submissions.
Permalink - Videos, Gear Review, Gunsmithing No Comments »
February 10th, 2026

Flash-Hole Fix — Tools to Clear Flash-Hole Obstructions

Flash-hole reamer

Even with high-quality brass from Lapua, Peterson, Norma, Alpha and RWS, occasionally you may find one or two cases per box which have a small flake or obstruction in the flash-hole. This will appear like a thin crescent on one side of the flash hole (see photo). You should inspect ALL new brass before loading to identify any pieces with a partially-obstructed flash hole. It’s a good idea to remove any flake or thin crescent left as an artifact of the flash-hole forming process. Because the flash-hole itself is normally centered and of the correct diameter, it is not necessary to ream the flash-hole to a larger diameter. All you really need to do is remove the small obstruction(s). This can be done quickly with inexpensive tools.

Use a Small Pin Vise to Remove Flash-Hole Obstructions
Folks have asked if there is a tool that can remove obstructions from a Lapua small, BR-sized flash hole without opening the hole size. The Lapua PPC/BR flash hole is spec’d at 1.5mm, which works out to 0.059055″. Most of the PPC/BR flash-hole uniforming tools on the market use a 1/16″ bit which is nominally 0.0625″, but these often run oversize — up to 0.066″.

If you want to just clear out any obstructions in the flash hole, without increasing the flash hole diameter, you can use an inexpensive “pin vise” with an appropriate drill bit. For $5.39, Amazon sells a 10-piece set of cobalt steel 1.5mm drill bits that match the Lapua flash hole exactly. Other vendors such as Ace Hardware offer a #53 pin vise drill bit that measures .0595″ or .060″ (depending or source). An 0.0595″ (1.51 mm) bit is close enough. You can find pin vises and these small-diameter drill bits at hobby stores.

Pin vises Lapua Flash hole

For quite some time, Sinclair Int’l has sold a similar device for small (PPC and BR-size) flash holes. Like the 749008617 unit for large flash holes, the 749005418 Reamer for small flash holes works from the outside, so it can index off the primer pocket. It reams to .0625″, and also costs $29.99. The standard dimension for Lapua 220 Russian and 6mmBR flash holes is 1.5mm or .0590″. This tool will permit standard-size decapping rods with .0625″ tips to work without binding. However, note that both Forster and Redding normally supply .057″ decapping pins with their PPC and BR dies. So, it is NOT necessary to ream your Lapua BR/PPC flashholes, unless you prefer to do so for uniformity. It IS, however, a good idea to check BR/PPC flash holes for burrs before loading the first time.

AccurateShooter Sinclair Flash Hole Reamer

Redding also makes a handy tool that deburs and uniforms small flashholes, but works from the inside of the cases. This Redding tool has a bushing that fits in the case neck for proper alignment.

AccurateShooter redding deburring tool Flash Hole Reamer

NOTE: If you purchase the Sinclair Flash Hole Reamer tools, we recommend you mic the cutter tip before you process a bunch of cases. Sometimes a tip comes through that is oversize. This will ream the flash holes larger than you may intend.

Permalink Bullets, Brass, Ammo, Gear Review, Reloading No Comments »
February 10th, 2026

ABCs of Reloading Book — Great Resource for New Hand-Loaders

ABCs of Reloading 10th Edition Phil Massaro Gun Digest

With the skyrocketing prices of ammo, more shooters than ever are hand-loading pistol and rifle ammunition. But many novice reloaders tell us that it’s a bit overwhelming in the beginning. Just learning all the technical terms (e.g. ogive, meplat, ballistic coefficient, load density etc.) is difficult, and the task of selecting the right tools and gear can be daunting.

The first thing a new reloader should do is find an experienced reloading mentor. One can learn the basics much more quickly under the guidance of an experienced hand-loader who “knows the ropes”. We also recommend that newbies acquire a good basic reloading handbook — not just a list of load recipes, but a book that explains the processes.

One of the best handbooks available is The ABCs of Reloading (10th Edition, 2021) by Philip Massaro. Released in March 2021, this reference contains 288 pages with hundreds of BW photos. The latest 10th Edition is available from Gun Digest Store for $29.99 (or $29.99 for Printable PDF Digital Book). You can also purchase from Walmart for $19.54 with possible Free Shipping.

ABCs of Reloading 10th Edition Phil Massaro Gun Digest

Since the first edition was published in the 1970s, the ABCs of Reloading series has taught countless firearms owners safe/reliable methods for creating their own ammunition. ABCs of Reloading provides beginners what they need to know to get started in reloading. From basic topics such as “How does a cartridge work?” and “What components do I need?” to more advanced discussions of cartridge pressure, headspace, and chrono testing, this is a great resource for new handloaders.

In addition, the sections on advanced reloading and new powders make the new edition valuable for experienced handloaders. And long-range shooters will benefit from the sections on making ultra-consistent ammo and fine-tuning for precision accuracy. Massaro’s coverage of new reloading gear and components is another bonus (shown below is the impressive RCBS MatchMaster powder dispenser).

ABCs of Reloading 10th Edition Phil Massaro Gun Digest

Review from purchaser of “The ABCs of Reloading”, 8th Edition:

“When I first got the itch to load my own ammunition, I was overwhelmed by the amount of information and terminology involved in this fascinating field/hobby. It was very difficult to take all the individual pieces of information that I had and form it into an understandable process. I was snowed in under a blizzard of data that I was piecing together through chat rooms and web sites. Phrases like ‘roll crimp’ and ‘headspace’ came at me in a blizzard. I could look up each phrase, understand each one as a piece, but still the whole picture was fuzzy. In essence, that is what this book will do for you — turn it all into a coherent, linear whole. The writing is very solid and clear, the illustrations are well-done and helpful, and the information is very complete. After reading this book, the entire process made sense to me, and more importantly, I was fully warned about the dos and don’ts of the reloading world. The coverage is very complete. Primers, powders, bullets, and … all necessary tools and accessories are discussed and explained. This is just a great book. It won’t make you an expert … but it will put you on the right road if you wish to become one.” — Mykal Banta

Permalink Bullets, Brass, Ammo, Reloading, Tech Tip No Comments »