Stonycreek Armory's M-1900 rate accelerator is designed to be used only in M11/9 Submachineguns. Do not use in a semi-auto.

The M-1900 will turn your SMG into a True "Burp Gun" as the sound made by 32 or 72 rounds fireing at about 2,000RPMs sounds like a bed sheet ripping! This item will short stroke your bolt and raise the rate of fire from the original rate of approximitly 1,200 RPMs to an incredible 1,850 - 2,000 RPM, rounds per minute! This will depend on many factors including ammo type, barrel length and other variables.

:: The rate accelerator is in stalled in this manner ::

First be sure your firearm is unloaded. Remove the upper receivers pin that secures it to the lower receiver. Slide out your SMGs bolt assembly. Push the Stonycreek M-1900 in between the two rods as far back away from the bolt as possible. Re-insert the bolt assembly into the upper receiver.

Replace receiver pin. Pull the bolt handle back a few time to be sure of smooth action. You will notice the bolt does not go back as far as it did originaly. Your magazines must be in good working order to handle the increased rate of fire. If your magazines have any problems the high rate of fire will let you know. The M-1900 has been used in our firearms for thousands and thousands of rounds with no problems.

If your firearm has any hidden flaws in the welds or construction the M-1900 may expose these problems but will not cause them. its vulcanized rubber construction is much easier on your firearm than hard plastic inserts. The M-1900 is a real crowd pleaser at shooting events. if you have any questions please email us at: products@stonycreekarmory.com

Shoot safely and enjoy the rush!

Stonycreek Armory
994 North Colony rd.
PMB-345
Wallingford, CT.06492