Ar15 vise block

The Smart-Fit AR15 Vise Block is the last lower vise block you’ll ever need. The patent pending block expands to fit any . 223 / 5.56mm AR15 magwell, making loose, sloppy fitting blocks a thing of the past. Insert the block into the magazine well and simply rotate the adjustment handle to tighten the fit. The Block allows you to safely clamp on to your AR-15 upper receiver in a vise holding it securely without twisting, crushing or marring the finish. This Block is the perfect product for torquing a barrel on, removing a stubborn barrel nut or for simple gun maintenance and cleaning. Generally, there are two main types of uppers: flat top and carry handle. Flat top uppers feature a picatinny rail, while carry handle uppers have a fixed rear sight assembly on the top. Upper receivers may also be referred to as A1, A2, A3, or A4 receivers.

Ar15 upper vise block

Some say the gas impingement operating system “poops where it eats”. But is that really fair? Here are Richard Mann’s 6 factual observations in the AR-15 direct impingement vs. gas piston debate. As someone who tests and reviews guns for a variety of firearms periodicals, I’ve had the opportunity to test versions of both the gas impingement and piston-driven ARs. Here are my factual discoveries:

1. Piston-driven guns run much cleaner. Fire a 30-round magazine through a piston-driven AR and it will look just as clean afterwards as it did before you fired it.

2. Piston-driven guns run much cooler. You’ll have to shoot about 100 rounds through a piston gun and a gas gun to really feel the difference, but it is there.

3. On average, piston-driven guns are less accurate. This does not mean piston-driven ARs are inaccurate, but, looking over my test records, the most accurate ARs I’ve tested have been those that work with the gas impingement system.

4. On average, piston-driven guns cost more. This observation must be qualified with “it depends.” There are some very expensive gas impingement ARs and some piston-driven ARs that are not all that expensive. However, if you want to purchase the least expensive AR possible, it will be a gas impingement gun.