See also: Easy Bayonet Mount (TM) MP5 Reflex Suppressor.
R12MP5 bayonet mount Reflex Suppressor
User's Manual for R12MP5 Reflex
Reflex suppressor or silencer R12MP5 of Heckler & Koch Maschinenpistole 5 is designed primarily for harsh military use. This steel-constructed device is a long-lasting and almost maintenance-free muffler of muzzle blast, flash hider and recoil compensator. Suppressor also helps to protect the shooter from hearing loss. Standard finish is military grade parkerizing.
Standard model R12MP5 extends just 134 mm forwards from muzzle. Suppressor is designed to withstand full-auto shooting of full power 9x19 mm Para cartridges. Reduction of shooting noise is considerable, but mechanical noise of firing cycle and bullet's flight noise (ballistic "crack") are impossible to eliminate by any suppressor. Flight noise of supersonic bullet is found to be useful in actual battle: Cracking sound of bypassing bullets tend to bluff hostile individuals, and so hide position of shooter, as muzzle blasts, muzzle flashes and other shooting signatures are eliminated with a suppressor. Shooting noise with suppressor and full-power 9x19 mm cartridges is about as loud as report of a .22 rifle with Super Speed cartridges.
For special operations it may be necessary to secure cartridges with reduced powder charge; so called subsonic loads with bullet velocity preferably less than 300 m/s. If commercial subsonic ammo is unavailable, any experienced handloader may develop and reload them. If bullet weight is 8 g or less, these loads are unable to complete feeding cycle of MP5 reliably. However, mechanical noise - other than snap of the hammer - shall be absent, and suppressed muzzle blast is not much more audible. Manual ejection and feed are quick and easy to accomplish. If bullet weight is 9 g or more, it is possible to get reliable automatic feed along with silent flight of the bullet. Mechanical noise is, however, always present. Silenced shooting with self-loading or full-auto firearms is possible just with limitations.
Mounting the Suppressor: H&K MP5 submachine gun has three bayonet-mounting lugs behind muzzle. If lugs and muzzle are undamaged, unaltered and not badly worn, mounting is done easily without special skill or tooling. First loosen the nut or cap from threaded sleeve integrated in the rear-end of the suppressor. Also turn loose transverse fixation screw. Slip the nut onto muzzle, placing grooves of it's central aperture on mounting lugs. Push the nut rearwards until grooves are slid behind lugs; then twist the nut one sixth of a revolution and fasten the fixation screw. Note: Function of fixation screw is just to prevent accidental twist-open of bayonet-mounting. Screw point shall not touch the wall of barrel between bayonet lugs. Never replace original screw (M6x7) with one having longer thread!
Mounting can now be completed by winding the suppressor clockwise, until conical mouth of threaded sleeve meets front end of lugs. Do not overtighten mounting! Wind by one hand; not with tools. Overtightening will cause unnecessary wear of bayonet lugs and in worst case eccentric fastening. Also, never shoot with the suppressor loose or the nut unlocked.
Maintenance: Reflex Suppressor is practically maintenance-free device. Normal fouling of powder and primers cannot take effect on its functioning. Loose solid impurities, like powder kernels and carbon chips, are easy to remove by brisk shaking, while keeping the silencer vertically, rear-end downwards. After shooting session it is advisable to remove the silencer. This helps water condensed from powder gas to evaporate away. For storage, ordinary gun oil can be applied.
For alternate means of bayonet mounting, see also manual of Easy Bayonet Mount (TM) MP5 Reflex Suppressor.
MP5 Reflex Suppressor
MP5 Reflex Suppressors on Internet: http://guns.connect.fi/rs/r12mp5.html
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