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This is the most quiet and accurate 5.56 x 45mm "sub-sonic" round on the market, with a mil spec MIL-STD-1474D reading of 117dB when used in conjunction with the Gemtech M4-QD suppressor and an M4 Carbine, and 114 db with the SRT Hurricane on an identical weapon. (reference: Paulson 1997 Silencer Trials, Report BR-71).
Other attributes: it is more accurate than M855 ammunition at 50 meters. Tumbles within 2-3" on soft tissue, producing a large wound channel. It does not use fillers which tend to clog suppressors.
The ammunition intentionally does not cycle the action, for the ultimate in quiet shooting.
Sold by the BOX (30 rounds per box) One military ammo can contains 18 boxes/540 rounds One large cardboard case contains 36 boxes/1080 rounds
WARNING! Do not fire any subsonic rifle caliber ammunition in H & K Firearms, or any firearm which has a fluted chamber. This type of chamber prevents cartridge case obturation (breech seal), allowing some of the propellent gasses to escape out of the breech, thus allowing the possibility of a projectile lodging in the bore. AR-15/M16 WARNING When utilizing this ammunition in an AR-15/M16 type weapon it is EXTREMELY IMPORTANT that the user follow these instructions: 1. MAKE CERTAIN that the chamber is clean and free of fouling. Brush it out with an M16 chamber brush prior to loading. 2. MAKE CERTAIN that the bolt is fully seated. Give the Forward Assist button a sharp rap. A condition has been noted in which the bolt is closed far enough to allow the firing pin to strike the primer, but the bolt is not 100% closed and locked. This condition causes the cartridge case to fail to obturate, allowing propellant gasses to escape to the rear and will stick a projectile in the bore, causing a potentially dangerous condition, should the user somehow fail to notice that the projectile did not exit the muzzle / suppressor. Some firearms will not function correctly with any subsonic ammunition although they will function with High Velocity cartridges. This is usually due to a rough, shot-out bore or (rarely) an out-of-spec chamber. If a particular weapon does not function with subsonic ammunition after following the above directions, chances are it is one of these weapons and barrel replacement is indicated if the operator wishes to utilize subsonic ammunition. Decrease in performance with High Velocity ammunition normally will occur shortly thereafter in the service life of such weapons. It is the responsibility of the operator to use this ammunition intelligently. If the user has any questions whatsoever, he should call the manufacturer at (512) 360-5327.
- Category: Subsonic Rifle
- Projectile: 63-gr. Sierra Match
- Velocity*: 1,000 fps
- *Exact velocity dependent upon platform in which this ammunition is fired. Many factors including barrel length, bore condition, chamber design, level of maintenance, etc. can affect the velocity of ammunition.
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