| Degree of difficulty: *****
Fits all QB78 family air rifles. This high quality single shot breech fits all QB78 family air rifles in both .177 and .22 calibers.
The main benefit is the increased height and clearance provided by this breech compared to the factory breech. The rise is 4.5mm greater than for the factory breech. This allows much greater clearance for 9oz tanks used on a QB79 or AR2079A, or for use with custom shrouded barrels. The breech also provides a precision mounting base for scope rings and accepts the factory rear peep sights, too. Installation is almost exactly the same as for fitting a factory breech. Barrels fit tighter than into most factory breeches and they are retained with two setscrews instead of one. This provides a very solid fixing for the barrel in the breech, useful as factory front bands can no longer be used with this breech due to the increased rise. The JRA breech is precision CNC-milled from solid steel and is supplied with replacement hammer and cocking pins, breech locking screw and barrel set screws. This kit can be fitted to any QB78 family air rifle ordered at the same time for a small additional fee. In this case, a new breech seal will be fitted to the air rifle, increasing muzzle velocity by up to 60fps. However, the old breech and other parts that do not fit (such as the Front Band) will not be included with the air rifle. Please Note. This Riser Breech is NOT compatible with the JRA Rotary Magazine and Mount for QB78.
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