Mac1 designed and manufactured brake for AirRifles & AirPistols. Heat can allow the removal of the brake at any time. This should only be done to a gun that has had a recent front end freshen up as the Brake will need to be removed if there is any need to service the front end. Wipe off the excess epoxy and make sure there are no problems with the alignment before the glue cures. The Brake glues onto the spacer with the glue being only applied on the spacer OD. It must be clamped down as well as pushed aft to make a seal while curing. It must bottom on the plastic seal or o-ring combination so it seals up and no glue can get into the barrel at the joint. The spacer that glues to the barrel must not bottom on the front plug. Installer will need to dry fit with the plastic seal(s) and/or o-ring to accommodate the various barrel lengths that were made. The spacer glues to the barrel and tube(apply glue to barrel and tube only) for about 2" at the front of the gun so it has plenty of contact area and support. This is for the more handy and is primarily made for Pro use. All Racine Benjamin and all Sheridan rifles will be able to use the Williams peep or open sights still if the front sight is moved back. Front sight will need to be removed or heated and moved aft to clear the brake. Different barrel lengths require plastic seal(s) and or o-ring provided to fit and seal(two plastic spacers and an o-ring are supplied). Stronger valve springs will keep the hammer from holding open the valve.Mac1 designed and manufactured brake for Benjamin & Sheridan Pump Rifles. If you want to, and feel like doing a complete valve rebuild, buy the parts from Pyramidair and pull the valve, replacing the springs. This shouldn't prevent smooth and useful operation of the gun. The valve stays shut even though the hammer is resting on the stem. In a newer gun, or one where the internal springs are stronger, the hammer sprng will not overpower the valve springs. The valve won't shut until the pressure is taken off, by cocking the gun, and moving the hammer to the rear. If the two inner springs are weak, the uncocked hammer lies against the valve stem, holding it open. When the hammer strikes the valve stem, the stem pushes against these two springs. The two inner valve springs hold the valve SHUT, so that pressure can build. The reason is based on the relative pressure of the valve springs vz. Just wondering if there is something wrong with one or two of them. The guns all look identical except for the color on the Silver Streak. The other will NOT build any pressure unless you cock the bolt first. One of the Blue Streaks will build pressure when pumping without cocking the bolt first. I have 2 Blue Streaks and a Silver Streak that I got from my Grandfather.
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