Air guns and air powered launchers are quite topical at the moment. There seems to be quite a few air rifle enthusiasts on the forum. With Jorge getting great results using high pressure air to power his arrow launcher I thought it would be challenging and fun to build something using relatively low pressure air. I will be restricted to sub 150 psi courtesy of my bicycle pump. As a teenager I worked shifts in a pvc pipe factory. With access to all manner of pipes and fittings, not to mention unrestricted high pressure air, you could imagine the mischief that took place. Last weekend I glued together a very basic pressure vessel out of 25mm pvc pipe around 500mm long. A ball valve and a tyre valve completed the job. The barrel is a 15mm pipe 1 meter long attaching via a reducing fitting. Roughed out a ply lever to work the valve and I had a working test rig. This rig is basically a blow pipe on steroids. All my testing was done with 80 psi. Ammo was to be cheap nails with a tape cone stuck on. From the first shot the nails would bend on impact every time. I switched to 75mm and 100mm hardened concrete nails to solve the issue. Testing was done indoors at around 5 to 6 meters range. No problem penertrating 12mm ply, and speed was impressive. Next tested were 150mm nails weighing nearly 30 grams. They hit hard, too hard actually. The unbraced ply was being flung around upon impact, bending the nails as they flew off. Some 19mm pine was clamped in the vice and easily pierced from 3 meters. The final shot was a full power test with the 100mm nail into the clamped pine. Went in and bent !!!!!! the hardened nail. Will test other ammo options then start on a build. Envisage a breach loader fully enclosed with a quick opening valve and trigger.