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GX factory literature rates the GX4 and GX4-1 air output rating at 11 liters per minute at 1 bar. That equates to 22 liters per hour @ 4500 psi or 310 bar. Most owners fill their SCBA tanks to 310 bar. That means a 6.8 liter tank X 310 bar holds 2108 liters of air @ 4500 psi. It takes 3...

The least complicated and easiest to maintain air compressor was the Shoebox. It was made in the U.S. but was relatively expensive. It was manufactured on such a small scale that it was impossible to compete with the Chinese imports that drove Shoebox out of business. If a larger...

After considering the FX King it is my opinion that it is a step backward from the Crown in several respects. Is it really necessary to have both manometers angled on what is supposed to be a traditional stock rifle? It has three negative points against it for me. I'm left handed and the...

Last year I bought a 9.8L Omega SCBA tank as part of a PCP package deal on the classifieds. It was in as new condition and I want to keep it that way. It's easy to damage the clear coat that covers the carbon fiber wrap. This tank sat unused until I recently made a simple carrier to protect...

The late Dr. Robert D. Beeman who founded Beeman Air Rifles was known to have an extensive collection of historically significant air rifles. Rock Island Auction Company in Illinois is auctioning some of his collection in their August, 2023 auction. Included in his collection are two Giradoni...

This is an expanded and revised list of carbon fiber tank sizes. It includes the different units of measure commonly found on tank labels. The purpose of this list is to serve as a basis of comparison to buyers who may be unfamiliar with different units of measure. This will help to...

Weaver 6-18X-44 side parallax rifle scope. Parallax down to 25 yards. Includes box, papers, sun shade, and finger adjustable turrets with removable caps. Light weight scope is ideal for bullpups and PCPs. Reticle has elevation holdover markings. Excellent bright image for a budget priced...

This scope looks brand new. It is a MTC Mamba Lite 4-16x42 SF IR scope with flip up scope covers. This is a 1 inch scope and it very light at 20 ounces. Side parallax adjustment from less than 10 yards to infinity. SBC2 reticle. 2x magnification end cap eyepiece. There are no marks on the...

This is a well cared for Air Arms S510 ultimate sporter extra FAC in walnut adjustable cheekpiece stock. No rings or scope included. It will ship in a hard case and include a male to male threaded adapter which allows the user to use any 1/2 UNF moderator of your choice. The rifle will also...

In the heyday of Beeman airguns they sold lots of accessories through retailers for their spring rifles. If an owner mounted a scope and removed the open sights they had muzzle brakes, filler screws, and rear sight plates for a finished appearance. These replacement parts are no longer...

He is a man of his word, highly recommended. Thanks William.

Air Arms S510 shrouds have an end cap which is female threaded 1/2-20 UNF not the typical 1/2-20 UNF male thread. Most moderators are 1/2-20 UNF female so an S510 would need a male thread moderator or an adapter for a standard UNF female one. There is stainless steel fitting that will adapt a...

Is there any way to self repair a scope which runs out of windage clicks before it reaches the bullseye at 25 yards? It is not a rings issue nor an alignment issue with a particular rifle. Using a different set of rings or change rifles and the same problem exists. The scope was made in China...

Today I found this website online. I know Airgunus is a scam but this one is Airgunsu and their contact information says they are located in Abilene, Texas. I can't pull up any information other than what their website says. Is this a legit outfit?

One of the most common questions posted on airgun forums is "what size o-ring do I need for this"? Many of the PCP manufacturers don't publish schematics or parts lists with o-ring sizes because they either want the income from parts and service sales or they just don't want people to work on...

One of the most common questions posted on airgun forums is "what size o-ring do I need for this"? Many of the PCP manufacturers don't publish schematics or parts lists with o-ring sizes because they either want the income from parts and service sales or they just don't want people to work on...

It can be scary when a new owner starts up an Alkin or Bauer compressor and hears that paint can rattling noise. It stops as soon as a drain valve is closed. The sound is actually the free floating third stage piston which stabilizes under pressure. The rattling piston causes no damage...

There is a lively topic discussion below about interchanging multiple calibers on Impacts. On a similar note, I'm curious to know if the multipurpose rifle to bullpup to tactical conversion kits for the Dreamline are really being purchased and used. Have they ever even been available? I have...

All of the different units of measure used for carbon fiber tank sizes and fill capacities can be confusing. This comparison chart lists the commonly used carbon fiber tanks. The first two columns show interior volume of each tank size in liters and cubic inches. The third column is the air...

Anyone considering a high quality compressor should watch this video by Airgun Advisor. The three compressor topics that seem to be discussed on this forum more than any others are reliability, availibility of parts and service, and value for the cost. This video on the W31 does a great job...